Button inside movieclip(from after effects) won't work

First, I have an animation I made in After Effects. I exported it from AE as a SWF. I imported it into Flash CS4, brought it to the stage, and then put a button inside of it. The mouseover of the button works. But I can’t the button to perform any actions. I get this error:

ReferenceError: Error #1056: Cannot create property onRollOver on flash.display.SimpleButton.
at MarineFoodsFlash_fla::MainTimeline/frame1()

My .fla file is 74mb but if need be i can strip it down and upload it. Just let me know. Any help would be greatly appreciated!