I just installed a Pioneer DVR-AO6U in to a brand new Dell computer P4 2.2 GHz, 256 MB and XP Home Edition. When I play audio CDs or DVDs the sound is jumpy. If I play a CD with .mp3 files it works great. Burning .mp3 files also works great. The Pioneer DVR came with an extra audio cable but I didn’t use it (not sure where it plugs in to the motherboard – there are a few options). Does anyone have any suggestions? Thanks in advance!