Flv / A.S. 3.0 issues

To try and familiarize myself with A.S. 3,0, I’ve created an actionscript 3 site, and I’m having some issues with a SWF that loads and plays flv’s. The swf works properly, but if you try to load a different swf while an flv is playing, the flv continues to play, only stopping once at the end of the flv or until you exit the site. Here is the URL:

http://www.angryprophetmedia.com

then click ‘video’, then click on any of the video options. Once the flv begins to play, then click any of the other buttons (home, graphics, etc), and you’ll see what I’m talking about. It seems the flv is stuck in cache or something. With A.S. 2.0, I don’t remember this happening. Once you loaded a new swf, whatever was playing before would be replaced by the new one. Do I need to use unload movie or something similar? Any help would be appreciated. Thanks in advance.