I have the same problem the button (which is only on manual roofs as far as I am aware) wont pop the lid, Im going to try to have a root around to see what i can find later on, Ive only just picked up the Cab this morning so not had time to have a fiddle yet, too busy giving it a polish
if anyone has had the same problem then feel free to let me know to save me the hassle of fault finding