I'm looking for the solution in the internet today, never found, it is not a HARDWARE problem ( i tried others phones )....
I have the driver installed ok. (Realtek High Definition Audio)
The only problem is that when i plug the headphones the sound keep coming out of the speakers.
I didn't have the problem until this week, that i "upgraded"(reformated actually) from home to professional (XP).
PS: I'm sorry, my english sux