Css-p issues?

Am designing site with CSS-P (using a Mac) - site works and looks fine on a Mac in either Safari or Firefox, but in IE on a Windows machine (running XP), the Rollovers don't work, the sites Search Engine (using javascript) doesn't work and the embedded Flash movie doesn't work - yet when I run the check browser option in Dreamweaver (8), no code errors are displayed... Have designed sites before with Rollovers that do work cross platform/browser - could the errors be linked to my use (over-use) of CSS-P?

Update re my CSS-P query - panic over. The reason my active content (ie. image rollovers, site search engine and Flash movie) wasn't working was because the two PC's which I'd used to open and view the website on, both had filters blocking/restricting active content switched on.