Turns out my friend whom has the same type of internet (wireless Broadband), modem, router etc. Limewire no longer works for him either. Yet a friend with a different kind of internet (Dial-Up) but same ISP connects to limewire fine.

I finnaly confirmed that the port 6346 is OPEN! but there is still no connection? Any Ideas?

this is really annoying cuz the connection gathers a few bars and then it disconnects, Ive tried uPnP and Manual Port Forward and they both do the same... Does it matter if i have SP1 or SP2, cuz I have SP1...