[RESOLVED] Need help with importing and creating a class

[skalie]

Howdy, I'm almost there....

This is working

import flash.external.*;
test.onRelease = function():Void{
    ExternalInterface.call("html_alert");
} 

.....but i would like to put it into a class, something like....

class Test extends MovieClip{
   function Test(){
      this.onRelease = function():Void{
        ExternalInterface.call("html_alert");
        }
    }
} 

That however will give this error message...

There is no method with the name 'ExternalInterface'.
                 ExternalInterface.call("html_alert"); 

Can anyone tell me which step I need to add to get this one up and going? Pretty sure I have to inherit the properties of the ExternalInterface class somehow, but I'm going around in circles here.

Thanks in advance.