Mouse Trailer and Preloader conflict

I have an opening page with a percentage preloader that functions as a MC on the main stage. The main stage is four frames long - the first three are the scripts for the mouse trailer, the fourth is the frame that jumps to the next scene. The trailer script runs the first three in a loop until my preloader MC is at 100% then it jumps the main stage to frame four going to the next scene. My problem is that when it jumps to the next scene the trailer stops, but DOES NOT DISAPEAR. It freezes and just stays where it is throughout the rest of the movie. CAN SOME ONE PLEASE HELP - I’ve tried a few forums to no avail! HELP!!!