I have that problem a lot...I forget to be ready for it every time I install the debugger on a different computer. I seem to have the best luck if I install ALL the files in the debugger directory...don't let Windows put stuff in the System directory. The debugger seems to prefer it's OWN copies of the support files in it's OWN directory, not someplace else, and not an upgraded version...but it's own exact, specific files in it's own, exact, specific directory.

Hope this helps.

Sarge