1120: Access of undefined property error/ help!!!

I created flash file that allows the user to navigate a timeline. When the user hits one of the buttons, the timeline moves to frame 5 and stops, where it displays a MovieClip of information.

In the MovieClip a  button resides on the top layer of the MovieClip that closes the panel. The MovieClip panel closes when the button (dishpanel_mc) is pressed and it takes the user back to frame 1.

I placed the ActionScript code on the Action layer in frame 5.

stop();

import flash.display.*;
import flash.events.*;

dishpanel_mc.addEventListener(MouseEvent.CLICK, dishpanelCLICK);
function dishpanelCLICK (event:MouseEvent): void {
gotoAndStop(1);

}

I get the error Location: Scene 1, Layer 'action', Frame 5, ...... Description: 1120: Access of undefined property dishpanel_mc, Source:  dishpanel_mc_(MouseEvent.Click,dishpanelClick);

How do I get this function to work?