Can not connect to PPTP

Hi all,

Recently I bought a RouterBOARD 951G-2HnD device, and now trying to connect to my Internet provider via PPTP.
The problem is that the connection seems established, but after short period of time is terminated with the following message in the log: “failed to authenticate ourselves to peer”. The credentials are double-checked, and my old D-Link DIR-615 is able to connect using the same credentials.

Can anyone please help me?

This is my PPTP configuration:
Clipboard02.jpg
Below is the debug log for the PPTP connection:

#       Time    Buffer  Topics  Message  
649     Mar/29/2015 13:18:35    memory  pptp, ppp, info SELS_PPTP: initializing...      
650     Mar/29/2015 13:18:35    memory  pptp, ppp, info PPTP->: SELS_PPTP: initializing...      
651     Mar/29/2015 13:18:35    memory  pptp, ppp, info SELS_PPTP: connecting...        
652     Mar/29/2015 13:18:35    memory  pptp, ppp, info PPTP->: SELS_PPTP: connecting...        
653     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: sent Start-Control-Connection-Request to 83.172.32.6    
654     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: protocol-version=0x0100 
655     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: framing-capabilities=2  
656     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: bearer-capabilities=0   
657     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: maximum-channels=0      
658     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: firmware-revision=1     
659     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: host-name=MikroTik      
660     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: vendor-name=MikroTik    
661     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: rcvd Start-Control-Connection-Reply from 83.172.32.6    
662     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: protocol-version=0x0100 
663     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: result-code=1   
664     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: error-code=0    
665     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: framing-capabilities=3  
666     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: bearer-capabilities=3   
667     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: maximum-channels=0      
668     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: firmware-revision=4608  
669     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: host-name=7201Sels      
670     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: vendor-name=Cisco Systems, Inc. 
671     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: sent Outgoing-Call-Request to 83.172.32.6       
672     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: call-id=0       
673     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: call-serial-number=0    
674     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: minimum-bps=2400        
675     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: maximum-bps=10000000    
676     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: bearer-type=3   
677     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: framing-type=2  
678     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: packet-recv-window-size=100     
679     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: packet-processing-delay=0       
680     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: phone-number-length=0   
681     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: phone-number=   
682     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: subaddress=     
683     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: rcvd Outgoing-Call-Reply from 83.172.32.6       
684     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: call-id=33873   
685     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: peers-call-id=0 
686     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: result-code=1   
687     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: error-code=0    
688     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: cause-code=0    
689     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: connect-speed=64000     
690     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: packet-recv-window-size=16      
691     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: packet-processing-delay=0       
692     Mar/29/2015 13:18:35    memory  pptp, debug, packet     PPTP->: physical-channel-id=0   
693     Mar/29/2015 13:18:35    memory  pptp, ppp, debug        PPTP->: SELS_PPTP: LCP lowerup  
694     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: sent LCP ConfReq id=0xc      
695     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <mru 1450>      
696     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <magic 0x3985b203>      
697     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <mrru 1600>     
698     Mar/29/2015 13:18:35    memory  pptp, ppp, debug        PPTP->: SELS_PPTP: LCP open     
699     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: rcvd LCP ConfReq id=0x1      
700     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <magic 0xc1520d91>      
701     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <auth pap>      
702     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: sent LCP ConfAck id=0x1      
703     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <magic 0xc1520d91>      
704     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <auth pap>      
705     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: rcvd LCP ConfRej id=0xc      
706     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <mrru 1600>     
707     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: sent LCP ConfReq id=0xd      
708     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <mru 1450>      
709     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <magic 0x3985b203>      
710     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: rcvd LCP ConfNak id=0xd      
711     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <mru 1500>      
712     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: sent LCP ConfReq id=0xe      
713     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <magic 0x3985b203>      
714     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: rcvd LCP ConfAck id=0xe      
715     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <magic 0x3985b203>      
716     Mar/29/2015 13:18:35    memory  pptp, ppp, debug        PPTP->: SELS_PPTP: LCP opened   
717     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: sent PAP AuthReq id=0x4      
718     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <user XXX>      
719     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: <password XXXXXXX>     
720     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: rcvd PAP AuthNak id=0x4      
721     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: Request Denied  
722     Mar/29/2015 13:18:35    memory  pptp, ppp, debug        PPTP->: SELS_PPTP: LCP close    
723     Mar/29/2015 13:18:35    memory  pptp, ppp, debug        PPTP->: SELS_PPTP: LCP closed   
724     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: sent LCP TermReq id=0xf      
725     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: failed to authenticate ourselves to peer        
726     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: rcvd LCP TermReq id=0x2      
727     Mar/29/2015 13:18:35    memory  pptp, ppp, debug, packet        PPTP->: SELS_PPTP: sent LCP TermAck id=0x2      
728     Mar/29/2015 13:18:35    memory  pptp, ppp, debug        PPTP->: SELS_PPTP: LCP lowerdown        
729     Mar/29/2015 13:18:35    memory  pptp, ppp, info SELS_PPTP: terminating... - failed to authenticate ourselves to peer    
730     Mar/29/2015 13:18:35    memory  pptp, ppp, info PPTP->: SELS_PPTP: terminating... - failed to authenticate ourselves to peer    
731     Mar/29/2015 13:18:35    memory  pptp, ppp, debug        PPTP->: SELS_PPTP: LCP lowerdown        
732     Mar/29/2015 13:18:35    memory  pptp, ppp, debug        PPTP->: SELS_PPTP: LCP down event in starting state     
733     Mar/29/2015 13:18:35    memory  pptp, ppp, info SELS_PPTP: disconnected