Sound skipping when reading audio files

[Young Spirit]

Hi

I've just bought a SoundBlaster 4.1 Digital and installed it with the latest drivers from Creative. However a strange thing is happening: every audio file that try to read (either audio CD, MP3s, etc.) with whatever reader (WMP9, winamp3, QT, or the Creative one) is suffering from "jumps" from time to time.

Specs: ASUSTeK A7N266-C (w/ 415-D nForce chipset), Athlon XP 2000+, 512Mb DDR, WinXP Pro SP1

Would anyone have any idea?

Thanks in advance