can't connect using winbox in lt2p

Hello ,
strange problem
I have a router connected to me with as l2tp-client
I have ping to the unit
I can enter the unit ssh\ftp\api
but i can’t enter to it using winbox\www

any idea why?

/ip service
set telnet disabled=yes
set api-ssl disabled=yes

in the firewall I have no filter

I can see he is trying to connect using winbox ,but he disconnected me
if I connect in cable I get access
Thanks ,