Help! External SWF is seriously screwing up

Everything was working fine up until this morning. External SWFs were loading proper, everything was perfect. I finished up the “media” page, ran the “case” file to check how the media.swf fit inside my case, and all of a sudden everything went to hell…

Basically, the page loads up fine. Then upon clicking any tab in the navigation bar, it plays the outro animation, starts to play the intro animation of the requested swf, and then proceeds to kick the entire page back to the initial loader, which then skips and glitches and generally effs up…

You can see it here - http://evolutionpresents.com/case.html

Can anybody help me? There is nothing in my coding that could cause this. Is it a flash player error? I’m honestly at a complete loss…