|I take it then the drive is seeing the disk in it OK but won't autoplay.|
It's probably not a driver issue but here's some info on that:
Just in case, some info on enabling/disabling autoplay:
About an mp3 disk not autoplaying; Mp3's are just files. If they're just burned to a disk the computer only sees it as a data disk and won't autoplay. It needs to be burned as an audio disk. My antique version of Nero won't do that for mp3's. I assume newer recording software will. Here's a freebie I think will work:
I assume by 'cda files' you mean .wav files (MP3 files are essentially compacted .wav files). If you buy a music cd from walmart or wherever and view its directory structure on your computer all you'll see is small 44 byte files with a .cda extension. Those are NOT the music files. They're virtual files created by windows as kind of a placeholder for the actual wav file, which don't show. If you copy those .cda files to a disk you'll only have small text files and no music.
In order to autoplay a disk with music it needs to be created specifically as an audio cd.
That's just a rundown of the basics. I hope it addresses your problem.