this is what this site says
Please remove disc from current CD/DVD drive and insert the original disc in another drive.
SecuROM™ has determined your computer has more than one CD/DVD drive and that the other drive(s) might perform better verifying the SecuROM™ signature. Please follow these steps to help resolve the issue:
•Please insert your disc into a different drive.
•If the problem persists, or you need additional assistance, please send a SecuROM™ analysis file to firstname.lastname@example.org (see Support Info section on how to prepare and send an analysis file).
but cant seem to find a fix and as far as im aware this game isnt and expansion pack.