If I delete the offending scene the movie goes on to another scene and then stops at a different location. I can't think of any logical way to solve this problem. I can't delete and rebuild the scene because the problem just remanifests. This project is supposed to be done!
Does the animation have more than 16000 frames in it? If so, it's likely to be the cause of the freeze. (And if it does at 2 minutes, may I ask are you making the animation at 120 fps? That's a bit too high...)
To solve that problem, can you break your movie into parts? You can, for example, break it into 10 parts each having about a minute, and load the next movie at the end of each part.
To load movies with AS3, see:
Yes, I'm pretty sure I hit the 16000 frame limit. It was stopping at about 8:50, @ 30 fps. I was going to try to retime the whole thing for 20 fps, but I think I'll try to link two movies together like you suggested instead. Thanks.
Oh, I misread the 2 minutes thing. But yeah, the frame limit is probably the reason.
For more about Flash and the limit of 16000, see this: http://helpx.adobe.com/flash/kb/flash-movie-size-limit-flash.html
The canvas size limit will be lifted to 8192*8192 in Flash CS6; I don't know if other limitations will change.