Components Mess Up

I’m using some of the MX 2004 components in a site, and they work fine when played directly in the MC they are in. However, when that MC is loaded into another container MC, the component seizes to function properly. For example, the combobox doesn’t drop down when clicked, and a button’s label text doesn’t display when I mask that button. Any help would be great, sorry I can’t post an FLA at the moment.