Htc one x connection problem

I just got my HTC One X battery replaced recently with a new HTC One X+ battery. Long short story, now the phone is unchargeable via computer or power socket, the storage doesn't connect to the computer when plugged in but usb fastboot still works for some reason. All of these problems instantly solved once I remove the white plastic cover, but of course I can't keep it like that. Any idea how to deal with this? Thanks in advance,