Js controlling flash movies

I’m wondering if anyone can help me. I have a shell .swf that is loading a few different movies into it. On part of my page I have some text links that I would like to call these movies which are based on different levels. I’m able to get the .js to talk to and manipulate the shell movie on the root level but I can’t get the movies on levels 1,2,3 etc. to communicate w/ the javascript.

Anyone have any tips / advice?

thanks in advance