Basic RollOver mc button problem

Hey folks,

I was toiling to title this one but put simply, I have a roll over and out button that is an mc. When the button goes into its mouse over state i have a layer inside the mc which is much larger than the button in its initial unselected state and tween in (its a speach bubble which sits above the text button). What happens is that it makes the dimensions of the button much larger so that i you roll over where the speach bubble would be it startes the roll over state of the button mc instace.

I thought that having a clear keyfram for the speach bubble might solve this problem but it dosnt. Does any idea how to fix this simple little problem…also, what is this called or should I have titles this post !! :slight_smile:

Thans a million and i hope this makes sense.