There are a few different versions of AsimCDFS, you need the AsimCDFS00 version rather than the AsimCDFS020 version( or higher?). you need to rename it to AsimCDFS in L: drawer.
The CD.device is very fussy (will not work on your setup, and is the cause of the guru...) use AsimCDFS.
The controller should also display the name of the CD-ROM if CD-ROM was recognised. yes...
Watch your spelling in the mount entries, they are case sensitive!
:-D