Loop problem

Hi all, I’m new here and am pretty new to flash and this loop problem is really giving me a headache.

I’m making a simple flash website and need some shapes to fade in when I scroll over a certain part of the page to show a kind of description of the link. I made a simple box fade in swf file with a stop(); in the actions layer on the last frame and imported it into a new flash document and set it in the “Over” frame in a button. The problem is that whenever I scroll over the button, instead of just stopping at the last frame, the animation keeps looping.

Did I do something wrong here or is there any better way to do this? Thanks loads for any help cuz I need this for an assignment.