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[dosraider]

Try this:

Mount c c:\oldgames\
c:
cd cm
cm



About what's wrong with your mount:
You directly mount the game folder as C:
Was NEVER so in plain dos.
You ALWAYS started from C: and did a 'cd name'
Whilst your mount can work for many games, many others will not be able to find the needed subdirs.

The game expects a c:\cm\ directory structure (folder)
Whilst with your mount you only have a c: and no c:\cm\ in dosbox