Likely a level problem

Someone please show me the where to go or what to do for this “simple” problem. I have a movie where I have three head tweens fading in one after the other (they do not overlap). What I am trying so hard to do is to be able to RollOver one of the heads and have information gif “COVER” over the other 2 heads so long as RollOver is true. Once RollOut I want to be able to RollOver another head and have an informational gif obscure the other 2 remaining heads, and so on.

I am pulling my hair out because depending on the order/level my informational gif will not cover over but lay beneath one of the later heads. I am SO very frustrated:sad2:. It is obvious that I am just beginning with Flash CS4 AS3. All of my attempts to AS3 something changing levels have been fruitless. This forum looks friendly to beginners so I registered.
Thanx for any help.