on release

[Emraan_Khan]

My script is not working from within a movie clip.... what should i do for this please help me...

my script is--

on(release){

    gotoAndPlay(5);

}

[Ned Murphy]

What is the script supposed to be doing that it is not doing - which timeline is supposed to go to frame 5 and play?

You should avoid placing code "on" objects and put it in the timeline instead.  The timeline version of the code would be...

objectName.onRelease = function(){

      gotoAndPlay(5);

}

where objectName is replaced with the instance name of whatever object is being clicked.

[Emraan_Khan]

"statement must appear within on handler" error occurs

[Ned Murphy]

That indicates you are trying to place the code on the object.  The code I provided goes in the timeline where it is easier to find.  Select the frame in the timeline and enter the code in the Actions panel.

You should answer the questions I asked in case the code needs adjusting anyways.