Restricting the map problem, reverting back to original state on release, and re-pres

1

I am trying to restrict the area in which that map can be moved via the drag script, except on release, it reverts back to its original state, so for example, I drag downwards a few pixels, I let go and then press again to move a further few pixels it reverts back :(, Is there a proper method for achieivng this?


map_mc.onPress = function() {
	this.startDrag(true, 0, 0, 200, 400);
}

map_mc.onRelease = function() {
	this.stopDrag();
}

Ah I just removed the true and it works, mmm can anyone please explain this to me? thx