I've just received my stagg, and I think there is something wrong! It seams like the battery don't want to connect, when I open the battery "door" (sorry for bad english...) it just pops out.. and when I'm playing it just make all these weird noises, as if the battery's not connected. anyone having the same problem? Or have a solution? It's really boring, especially since the bass is not more than one hour old.. pleas help! Sincerely stressed out norwegian bloke!