Flash ActionScript3.0: a sluggish swf - how to fix, debug, optimize?

hi. i have an fla file that when movie tested - the swf is quite sluggish particularly when the the videos play inside the mcies.

The file has a few frames, a document class that sets up a timer event that loads mcies in the library to the stage. Some of these mcies have FLVPlayback components, plus the frames on the timeline have FLVPlayback components too.

So, what u get is a lot of flvies playing at once as the movie clips are generated from the library.

If the user does NOT click to removeChild, the movie clips keep coming back. This is a kind of bubble game, which i want to put online, but am worried it's overly processor intensive.

if anyone know how to optimize using debug or garbage collection codes, i'd really appreciate assistance.
thanks.