MODI opens quite slowly

I've been using the MODI feature for years in Office 2003 and love it. I
have a new PC with Vista and installed Office 2007 - including the MODI
feature, which was hidden. When I try to open MODI my mouse pointer locks up
for about 20-30 seconds and then the MODI app finally opens. When the app is
open and I access additional documents, the additional instances open
immediately - it's just the first instance that locks up for about half a
minute. I've run the "repair" utility for Office in Control Panel/Programs
but that didn't help. I even uninstalled and reinstalled Office 2007. Is
anyone else having this problem? Can anyone give me any suggestions on what
to do?