Somthing weird is going on.

Mappoint Automation Code which I have written months ago & not touched has stopped working on my development machine

Now sometimes, but not all the time, I am getting

"Fatal Error: Exeption code =C0000005"

This is driving me crazy! Everything else appears to be working correctly, i've reinstalled Mappoint 2006, but it's exactly the same

I am will to reinstall all my stuff onto my development machine, but that will be my last resort!

Any help extremley appreciated