VPN l2tp/IPSEC no communication

I set up l2tp and it works, but when I turn on the server side
IPSEC and enter the password xxx then the tunnel does not connect

I enter the same password at the customer.
What is the reason?

I show logs.

22:50:08 l2tp,ppp,info L2TP DO PRACA 11: terminating... - session closed 
22:50:08 l2tp,ppp,info L2TP DO PRACA 11: disconnected 
22:50:09 l2tp,ppp,info L2TP DO PRACA 11: initializing... 
22:50:09 l2tp,ppp,info L2TP DO PRACA 11: connecting... 
22:50:33 l2tp,ppp,info L2TP DO PRACA 11: terminating... - session closed 
22:50:33 l2tp,ppp,info L2TP DO PRACA 11: disconnected 
22:50:34 ipsec,info ISAKMP-SA deleted --JAKIS ADRES IP--[4500]---!!!!JAKIS ADRES IP!!!!!--[4500] spi:
f459ba5777a101a9:4e73cb1c9eee39f4 rekey:1 
22:50:34 l2tp,ppp,info L2TP DO PRACA 11: initializing... 
22:50:34 l2tp,ppp,info L2TP DO PRACA 11: connecting... 
22:50:37 ipsec,info initiate new phase 1 (Identity Protection): --JAKIS ADRES IP--[500]<
=>--!!!!JAKIS ADRES IP!!!!!--[500] 
22:50:39 ipsec,info ISAKMP-SA established --JAKIS ADRES IP--[4500]---!!!!JAKIS ADRES IP!!!!!--[4500] 
spi:e10b1a443a5f71e4:79cf25c3bb5d4e63 
22:51:01 l2tp,ppp,info L2TP DO PRACA 11: terminating... - session closed 
22:51:01 l2tp,ppp,info L2TP DO PRACA 11: disconnected 
22:51:02 ipsec,info ISAKMP-SA deleted --JAKIS ADRES IP--[4500]---!!!!JAKIS ADRES IP!!!!!--[4500] spi:
e10b1a443a5f71e4:79cf25c3bb5d4e63 rekey:1 
22:51:04 l2tp,ppp,info L2TP DO PRACA 11: initializing... 
22:51:04 l2tp,ppp,info L2TP DO PRACA 11: connecting... 
22:51:07 ipsec,info initiate new phase 1 (Identity Protection): --JAKIS ADRES IP--[500]<
=>--!!!!JAKIS ADRES IP!!!!!--[500] 
22:51:09 ipsec,info ISAKMP-SA established --JAKIS ADRES IP--[4500]---!!!!JAKIS ADRES IP!!!!!--[4500] 
spi:70006cbd9bb75e6a:1c7477cd7d62ee85 
22:51:12 l2tp,ppp,info L2TP DO PRACA 11: terminating... 
22:51:12 l2tp,ppp,info L2TP DO PRACA 11: disconnected 
22:51:12 l2tp,ppp,info L2TP DO PRACA 11: initializing... 
22:51:12 l2tp,ppp,info L2TP DO PRACA 11: connecting... 
22:51:12 ipsec,info ISAKMP-SA deleted --JAKIS ADRES IP--[4500]---!!!!JAKIS ADRES IP!!!!!--[4500] spi:
70006cbd9bb75e6a:1c7477cd7d62ee85 rekey:1 
22:51:12 system,info device changed by loginmoj 
22:51:13 ipsec,info initiate new phase 1 (Identity Protection): --JAKIS ADRES IP--[500]<
=>--!!!!JAKIS ADRES IP!!!!!--[500] 
22:51:14 l2tp,ppp,info L2TP DO PRACA 11: terminating... 
22:51:14 l2tp,ppp,info L2TP DO PRACA 11: disabled 
22:51:14 system,info device changed by loginmoj 
22:51:15 ipsec,info ISAKMP-SA deleted --JAKIS ADRES IP--[4500]---!!!!JAKIS ADRES IP!!!!!--[4500] spi:
0a9ac8fa36ef0385:e9cefdbf0846404d rekey:1 
22:51:31 l2tp,ppp,info L2TP DO PRACA 11: initializing... 
22:51:31 l2tp,ppp,info L2TP DO PRACA 11: connecting... 
22:51:31 system,info device changed by loginmoj