Wrong Image ( it break when i used rotation in flex), it break more and more when I click it

[Jack Hash]

I realize that only if i use rotate function, i make my Image break any more when I click in it.
Then i only code simple example about rotation, it the same make problem
here is my video : http://www.youtube.com/watch?v=k3Ih6D8dQd8&feature=youtu.be
and here is my click function :
private var currentChannelDeg:Number = 0;
protected function CHANNEL_clickHandler(event:MouseEvent):void
{
Image(event.currentTarget).rotation = currentChannelDeg;
currentChannelDeg+=45;
}
how can I solve this problem. tks everyone