Using .swf with phpbb3 styles

Not entirely sure if this is the right place for this…

I’m making a phpbb3 forum style, and I want my flash banner and navigation bar at the top.

I’ve got them both appearing, but for some reason, none of the buttons on the navigation bar, which are defined by an XML document, are appearing.

The code I’m using to display them on the style is identical to that used on other web pages where the buttons display perfectly.

Can anyone tell me why this is?

Thanks in advance.