Win311 Q: login & Windows EXIT

[ts at polynet.lviv.ua]

Hi
Maybe this is a common stupid problem, but when I try to login to
Samba server from Win311 (right after its start) Windows exits
very quickly to DOS prompt without error messages.

If I enter Windows without loginning to Samba server, and try to login
then it hangs (mouse is still active) showing me its watch. 
I have a couple of Win311 hosts and this happends with all of them. 
What could it be ?
My Win95 machine logins just fine.

I'm using TCP/IP from
ftp://ftp.boerde.de/pub/systems/dos/wfw311/tcpip/wfwt32.exe 
and it works fine to me.

Any help will be appreciated,
thanks.