[SLE] "Permission denied" on CDs - 64 bit SUSE 10.1

I've just noticed something curious, with my 64 bit SUSE 10.1 system. When I insert a CD-ROM into the drive, the usual KDE Daemon panel pops up, asking what I want to do. I select "Open in New Window", but then get "Permission Denied". This does not happen on a 32 bit 10.1 system, where the CD opens normally. Any idea where I might look for the cause of this problem? tnx jk