Code help

1

hi all! i cannot figure out what the error is. i have a movieclip, for a navigation bar, that when i hover over it, it should move up and stop, then when i move out of it, move back to its original.
this ‘home_mc’ is 20 frames long, at frame 1 i have included a stop(); action, also at frame 10, and at 20 (although not necessary there), but the movieclip will not play… i tried replacing enterFrame with load, but without success…

onClipEvent (enterFrame) {
    home_mc.onRollOver = function () {
        gotoAndPlay('up');
    }

    home_mc.onRollOut = function () {
        gotoAndPlay('down');
    }
}