problem booting from a pcmcia CD-ROM

I am having a problem booting from a CD-ROM which is attached to a laptop via a SCSI card.
In my config.sys, I set up the card services like this:

devicehigh=a:\ssvadem.exe
devicehigh=c:\cardwork\cs.exe
devicehigh=c:\cardwork\csalloc.exe
devicehigh=c:\cardwork\cardid.exe

and then I load the device drivers for the SCSI interface:
device=aspi8u2.sys
device=aspi8dos.sys
device=aspicd.sys /D:mscd001

and in my autoexec.bat file I have the line:
mscdex /D:mscd001

but all I get is "device 'mscd001' not found."

If you have any answers on this subject I would your help. Thanks