Animating object over 3d object to causes disappearance

Hi,

I’m wondering if anyone has seen this bug and has a fix for it.

I’ve got a movieclip with some bitmaps rotating in 3d, all good there. But when I load a swf over it and animate an object in that swf, parts of the 3d object underneath it disappear.

I’ve attached some screenshots to show sort of what I mean. I’ve got a link if you’d be interested in thinking it out with me.

Thanks!!
Dave