Problem getting external swf to function

I have created a movie with a scrolling menu of thumbnail images that when clicked on will bring up their larger image swf loaded in a container clip. This works fine when the swf doesn’t do anything. But I have made it so that some of the swf contain images that you can scroll through. They work fine as stand alone movies, but when I load them into my movie that has the container clip, I can no longer scroll through the image. Any suggestions as to how to fix this?