Another Error

[7iven8Nine]

TypeError: Error #2007: Parameter hitTestObject must be non-null.
    at flash.display::DisplayObject/_hitTest()
    at flash.display::DisplayObject/hitTestObject()
    at CrappyBird_fla::MainTimeline/Move2()[CrappyBird_fla.MainTimeline::frame2:73]

Anyone know how to fix this? it happens when I press a button on my app. The coding is ActionScript 3.0.
Update:
Fixed

 

[Retr0Capez]

Looks like it has something to do with graphics tied into the function.