thanks for your answer but:
1-i already have a static ip;
2-no others limewire are running cos' it's 2 days i'm here alone;
3-this is the most strange thing: the other laptops work without port forwarding.I'm the only one using it but even unchecking it it doesn't. Anyway, it still doesn't work connected with a normal DSL I have at my parent's place so I think it is a sw problem.
Thanks
Biz