.SWF is giving me a box of 'blurred' graphics, HELP!?

I am making a presentation to explain a medical condition to patients, and using .swf files to explain how the heart works. I am creating these using studio anime pro and exporting them to .swf and using them in prezi. The first two I made are working fine, its just the last one is giving me this odd box to the right of it:

http://prezi.com/1tbd2x3hjpld/?utm_campaign=share&utm_medium=copy&rc=ex0share

theres a link to my prezi where it's happening, it's really confusing/stressing me out! I have remade the animation from scratch twice and no idea whats going on!

thanks,

Leo