Sorry for not responding qucker guys.
My pc configuration is the following:
AMD Athlon XP 2000+
256 DDR PC2100
GeForce4 MX/440 128Mb
On-board Sound/Network Card
Hope that helps, and if you have any other suggestions, I'd be glad to read them.
PS. <MicroBell> There is a descripiton of the problem right before the message you posted.