Slow/No streaming HTPC NAS

Just bought an 493G

I used to have a WRT54GL and never had problem to stream video from my NAS to my HTPC
Streaming made from NFS

 /interface ethernet> print
Flags: X - disabled, R - running, S - slave
 #    NAME        MTU MAC-ADDRESS       ARP        MASTER-PORT      SWITCH
 0 R  ether10    1500 00:0C:42:A9:CF:A2 enabled    none             switch1
 1  S ether11    1500 00:0C:42:A9:CF:A3 enabled    ether14          switch2
 2  S ether12    1500 00:0C:42:A9:CF:A4 enabled    ether14          switch2
 3 RS ether13    1500 00:0C:42:A9:CF:A5 enabled    ether14          switch2
 4 R  ether14    1500 00:0C:42:A9:CF:A6 enabled    none             switch2
 5 R  ether15    1500 00:0C:42:A9:CF:A7 enabled    none             switch1
 6 RS ether16    1500 00:0C:42:A9:CF:A8 enabled    ether15          switch1
 7 RS ether17    1500 00:0C:42:A9:CF:A9 enabled    ether15          switch1
 8 RS ether18    1500 00:0C:42:A9:CF:AA enabled    ether15          switch1



/interface bridge> print
Flags: X - disabled, R - running
 0  R name="bridge1" mtu=1500 l2mtu=1524 arp=enabled mac-address=00:0C:42:A9:CF:A6 protocol-mode=none priority=0x8000 auto-mac=yes admin-mac=00:00:00:00:00:00 max-message-age=20s forward-delay=15s
      transmit-hold-count=6 ageing-time=5m



 print
Flags: X - disabled, I - inactive, D - dynamic
 #    INTERFACE                                                                         BRIDGE                                                                        PRIORITY  PATH-COST    HORIZON
 0    ether15                                                                           bridge1                                                                           0x80         10       none
 1    ether14                                                                           bridge1                                                                           0x80         10       none



/ip firewall filter> print
Flags: X - disabled, I - invalid, D - dynamic
 0 X ;;; place hotspot rules here
     chain=unused-hs-chain action=passthrough

 1   ;;; Accept established connections
     chain=input action=accept connection-state=established

 2   ;;; Accept related connections
     chain=input action=accept connection-state=related

 3   ;;; Drop invalid connections
     chain=input action=drop connection-state=invalid

 4   ;;; UDP
     chain=input action=accept protocol=udp

 5   ;;; Allow limited pings
     chain=input action=accept protocol=icmp limit=50/5s,2

 6   ;;; Drop excess pings
     chain=input action=drop protocol=icmp

 7   ;;; From our LAN
     chain=input action=accept src-address=10.0.0.0/24 in-interface=bridge1

 8   ;;; Log everything else
     chain=input action=log log-prefix="DROP INPUT"

 9   ;;; Drop everything else
     chain=input action=drop

10   ;;; Forward RDP to Server
     chain=accept_list action=accept protocol=tcp dst-address=10.0.0.254
     src-port=3389 dst-port=3389

NAS is on port ether18 HTPC ether17
is there something wrong with my config?
or anyway I could do diagnostic?

everything is fine with streaming over cifs, but i know my NAS has better performance with NFS.