Black Screen after Loading

[Vismaypikachu]

I have a google sites page and I attached the Nesbox.swf to the page. The frame loads with the emiulator, but I can't load anything. Please help. My site is here:
https://sites.google.com/site/vismaysemulator/emulator

[Vismaypikachu]

I can load roms now, but there's a black screen.