David G on "Yet another MBX Question"

I've just started using MBX and haven't had time to read carefullly through everything in tthe user's guide yet. That said, here's my question: on this page – http://bigboiandbobbi.com/test2/ the MBX created video at the bottom of the page has a white frame around it and I cannot seem to get rid of it. I have tried all of the options at the bottom of the MBX dialog box (matte, rounded, border, etc.) to no avial. What am I missing?

Thanks,
David