Unload movie driving me nuts!

Ok here’s the deal.

I have a flash movie, let’s say it loads on level 0. When you click on one of the buttons in the navigation, it loads another movie on top of the original in level 1. Now, in level 1 when the movie gets to frame 10 I have an action telling it to load another movie on level 2. My problem is I can’t get that movie to unload when I click on any sub nav buttons in my level 1 movie. Any action script I have tried just wont work. Do you have any suggestions?

Here’s the quick version:

level 0 loads a movie on level 1 with the click of a button. level 1 loads another movie on level 2 after an action on the time line of “loadMovieNum(“dorg_movie.swf”,2);”

I have a sub navigation in my level 1 movie and I want them to unload the movie that has loaded on level 2. Can anyone help?