Controlling Stage Area for Mouse Trail Effect

I created a 300x250 Web banner for Google with a mouse trail effect. The banner will not upload because, according to the Google tech people, the banner contains animation that goes “out of bounds.” Common sense tells me that if a mouse effect is applied to a Flash banner, then it should only be occurring when a user mouses over that banner. However, I was told that the mouse effect does indeed take place outside the 300x250 banner boundaries, which is preventing the banner from being fully uploaded live.

Does anyone know how to define the stage area so that the mouse effect only occurs in this 300x250 space? Perhaps the only way to get around this is to create a 300x250 hidden button and somehow make the mouse effect occur on rollover. If that is the case, then does anyone know how to do that?

If you would like to view the original tutorial that I used, then just search for “kirupa mouse effect.” It is the first link in the results.