Dead remote site flash

I hope this is the right forum. I’m working with an Actionscript 2.0 flash file (though I’m using CS4), trying to determine the cause of the following problem:

The client has a flash menu on their own Site A, hosted on their own server. They have some dynamically generated pages on another server, Site B, and that server displays the information and creates a template by pulling the flash menu remotely from the original site’s server, Site A.

The flash displays correctly, rollovers animate and work fine, but none of the buttons get the URL. They’re just dead when clicked on, whether their supposed to go to a page on Site A OR Site B. I’ve never encountered this problem. What should I be looking for to fix it?

Thanks in advance.