MC Won't stop on rollover

Alright, I’m currently working on a project for a friend of mine. He wants me to make a pseudo Photogallery, where all one would need to do is rollover a button, and the main image will fade in and load. So, I have the fla at the point where I have one button and one main image pre-loaded (ignore the initial pre-load alpha fade in. That was just a test for how I plan on loading the individual images.)

Here is the swf

Now, the problem is, when you rollover the button, the mc DOES in fact go to frame 2…but then goes immeditely back to frame one, even thought the coding on the button AND in the mc both say stop().

Any thoughts on this?