Array Problem "1069"

programming flash
1

I add a child to an array after its added

if (_viewLandedAtAsBase == true)
            {
                
                addChild(asBaseScreen);
                currentBase.push[asBaseScreen]
            }

then later on as a test i want to trace it

trace("currentBaseFromView= "+currentBase[0])

when i land at the base i get the folowing error

ReferenceError: Error #1069: Property [object AsBaseScreen] not found on builtin.as$0.MethodClosure and there is no default value.
    at AsteroidSupplyView/keyPollUpdate()
    at AsteroidSupplyApplication/enterFrameHandler()