I took a quick scan of your site and it seems to be working. All of the links seem to work for me. There are several ways to load a movie with flash. Your using levels. I tend to prefer to load to a movieclip holder. It gives you more control over the loaded movies as you can control the movieclip hoders properties....._x,_y,height,width,_alpha,etc...Eit her way,... loading to a level or to a container movieclip, you dont really need the unload method. Any content loaded into the level or container clip will replace the current content on the level or in the clip. The preferred method of loading an external .swf.....
A mind once stretched by a new idea never regains its original dimensions.
- Oliver Wendell Holmes