I thought my problem (can't play XMMS on CD-ROM) was gnome-mount, and this Forum successfully showed me how to delete gnome-mount, whereupon XMMS played the file, but, as Pita surmised at the end of that thread (Removing gnome-mount, posted in Technical General on Oct 22, 09), removing gnome-mount didn't help for long. As soon as I rebooted, the CD-ROM would not mount the file. I reloaded gnome-mount but that didn't help. I tried to follow Pita's suggestion re switching XMMS to digital, but don't see how to do that.
As my other T-42 (also running VL 6.0 standard) mounts the multimedia CD-ROM fine, I am not sure why this T-42 doesn't, or at least doesn't with any regularity. It mounts CD's with text or programs on it just fine, though, unlike on my other T-42, I have to click on the mounting icon at the bottom (doesn't seem to show files on CDROM automatically). I have reinstalled all programs that I think might work, but neither Thunar nor XMMS shows the multimedai file in question. As I mentioned in the other thread, my other T-42 shows it fine. And though the CDROM shows up in when I push the mounter button at the bottom of the screen, it shows as red (not mounted) on multimedia files (contra text CD text files which show mounted).
My own guess is that I have removed some library that is needed but have no clue which one. I have installed the CDROM on VASMCC several times but doesn't work. I removed the CDROM from the "load at boot" program on vasmCC but again no difference that I can see. Any suggestions on how to get my system to recognize a music audio file on CDROM are appreciated.