ActionScript 1/2 :: Class Extends MovieClip But Can't Call 'addChild'


I'm working on a Flash Lite 3.0 application using AS2 and I've created a class that extends MovieClip. The problem is that I'd like to dynamically add Child Movieclips using the addChild method... but it doesn't work, it gives me the following compiler error: "There is no method with the name 'addChild'". But I can call other MovieClip specific methods such as this.getNextHighestDepth()