Help Error #1063

I get this error:

ArgumentError: Error #1063: Argument count mismatch on ShipMc(). Expected 1, got 0.

    at flash.display::Sprite/constructChildren()

    at flash.display::Sprite()

    at flash.display::MovieClip()

    at Main()

This is the main Class:

public function Main() {

            ship = new ShipMc(this.stage);//create a new ship

            //in ShipMc we need stage to create the keyObject

            this.addChild(ship);//add ship to stage