Can't play Audio CD's

Hi, All hardware problems have been sold, except for the audio problems:

1) "CD-ROM read or access error (or no audio disc in drive).
Please make sure you have access permissions to:
/var/tmp/kdecache-derk/krun/16567.0.Track 01.cda"

2) The PC Speaker will work under any User except for user derk....



TIA, Derk
.