FLV giltches - need help

First let me give you a link:

Site Link

O.k. now the problem:

If you goto the above link and when you get to the navigation menu on the site. by rolling over the 5 links you will see that I have some small 3d animations that change on the up, over and down states...

all the FLVs are embbeded and were brought in as movie clips. My question is why do they glitch... it seems as if there is a video caching problem here... what causes this. is there a way to keyframe the flv? :yikes:

I have been trying to find an answer on this issue and no one has been responding. I am hoping someone here has an answer.

If someone is interested in seeing the source code I can post the FLA, please let me know.