fair point, although from OP's posts he's not exactly rushing to help sort it is he? if he knows the password it's not difficult to fix. why stall?
Not totally sure what's the hesitation to fix. But I'll just feel hopeful that the buyer is still communicating with OP. Perhaps, the buyer is busy... Has matters he have to take care of. Perhaps, he's not feeling well. Maybe... He had a serious situation... Who knows? But if the buyer no longer responds... Then yeah... OP should be worried.