Hi Kevin,
Well it seems to be the week for posts with strange Opus happenings - but that doesn't solve the problem
Can you post the EXE (it will need to be zipped) and IMP file and I'll run them in a sandbox here and see what the problem might be.
The new PC issue would seem to be an odd reason for things not to work, unless you've switched to Vista - in which case I guess anything is possible.
Mack
P.S Almost forgot - add some info about your hardware (new and old) & OSs to the post as this will really help.