A problem when exporting something as swf

Whenever I publish something as a swf file the screen is just black. Um…any help? ???

Well, what are your system/software-specifications…? How big is your export…?
What program (Browser / SWF-Player) are you using for playing that SWF-movie…?
Should your computer run out of memory ? Open “Studios” System-Preferences / Display /and add more Memory Usage… (Does that make any difference to your export…?)
Maybe, if possible, increase virtual-memory on your computer as well.