Fullscreen not working correctly in loaded swf

I have a swf loading an external SWF which is a video player. The video player loads fine into the SWF, but if I hit full screen it goes full screen but I cant see anything. Its all black. I can still see the “hit escape to exit” bubble thing.

If I embed the video player by itself(ie. ISNT loaded into a swf) the full screen function works fine.

Any ideas?