IE dialog boxes and pull down menus greyed out after upgrading to XP

We are currently rolling out XP pro onto all our NT boxes. I have run into an issue with some of our inhouse web pages. The guy who designed theses pages has long gone (just my luck) and no one knows how it was developed. The deal is that once XP has been installed including IE6 some of the pulldown boxes, dialog boxes and maybe some radial boxes are greyed out completely. This worked fine with NT 4 w/t sp6a installed running ie 5.5.

I am leaning towards an development issue that proberly needs to have changes made to work with XP. But it may be a widspread issue and was wondering if anyone had a similar issue or knows of a patch that could fix this?

Thanks...

humm there might be a disbale tag in the form tags or some java script disableing it... cant say unless I look at some code

have you tried going into the internet options and restoring defaults on the security settings as well as the advanced options