Movie Clip Menu Issue

Hi,

Just wondered if anyone could inform me as to why theis is currently not working. Im sure everything is correct and should work though :-/

Heres the fla : http://www.horner.dsl.pipex.com/livebrief/TreeScene(small).fla

On the main page is a movie clip containing all my elements of a menu. Inside that movie clip is a movie clip called “show menu”. When this is clicked i am wanting the timeline to play an animation in the holding movie clip.

Heres some code :
[LIST]
[]“menupanel”= movieclip on root timeline[/LIST][LIST]
[
]“showmenu” = movieclip inside the “menupanel” movieclip[/LIST]

stop();
 
this.showmenu.onRollOver = function () {
    showmenu.gotoAndPlay("up")
}
this.showmenu.onRollOut = function () {
    showmenu.gotoAndPlay("down")
}
this.showmenu.onMouseUp = function () {
    menupanel.gotoAndPlay("show")
}

Really appreciate some input

Cheers

Tom