Advance RollOver question

Hi, experts

I have a script that works and i try to make each images button becomes large after roll over. Roll over part of code is not working. Please let me know how to fix it.

Thanks

Example http://www.brianlinstudio.com/testingExample.zip

------------- Roll over part code ----------------

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function buttonOver() {
      _loc1 = this._parent._parent;
      trace("which one is roll over now --  "+this._parent);
      this._parent.gotoAndStop(6);
      _loc1.myName = _loc1.projects[i];
      //_loc1["button"+i].gotoAndStop(1);
      mc = _loc1["myTarget"+this._parent.i];
      mc._xscale = mc._yscale=120;
      prev_width = this._parent._width;
      this._parent._xscale = this._parent._yscale=120;
      after_width = this._parent._width;
      this._parent.buffer = (after_width-prev_width)/2;
      this._parent._x -= this._parent.buffer;
      this._parent._y -= this._parent.buffer;
      mc._x -= this._parent.buffer;
      mc._y -= this._parent.buffer;
      mc.swapDepths(120);
      this._parent.swapDepths(121);
}
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