Unable to play the current frame actionscript 3

programming flash
1

Hi, I have a problem on playing the current frame. which means to replay the frame.
I have need to play back the frame 5, however it end up on playing the frame 6 which is the next frame. I couldnt brain this as I am stuck! Helppp

function reset(event:MouseEvent):void
{

	gotoAndPlay(5);

}