[AccessD] ActiveX problem?

I have an Access Data Project (access 2000) and it contains a bound subform.
When I enter lineitems into the subform, then return to the parent form and
make a data change, I end up having the display of my lineitems clear out
for some strange reason.??? I tried -re-importing these forms from my backup
of the adp, adn I received the following error:

There was an error loading an ActiveX control on one of your forms or
reports.
Make sure all the controls that you are using are properly registered. For
infomration on registring an ActiveX control, click Help.

any ideas? the only thing I recently did was reload my Studio dot Net 2003.
:(

thanks...
--
-Francisco
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