jQuery UI components not visible only from my site upon remote IE 7 browsers

Hi

I am creating a Drupal 6.x site with jQuery UI components, and it has been working fine with FireFox.

I am having an issue with jQuery UI components not being visible from my site only on IE 7 browsers.
The same components on my site are visible/usable with FireFox on the same remote Windows box.
In addition, if I open the same IE 7 browser to the jQuery demo site, http://jqueryui.com/demos, the demo jQuery UI components work just fine.

So, what must I do to my Drupal site to make jQuery UI components visible to IE 7 browsers?

Thanks

Jeff in Seattle