I feel like the one who replied this to you is the new owner. It's also likely that the previous owner has deleted all the PM logs of the account and sold the account to run away from his responsibility to pay you. So when the new owner received your PM, he has no idea what's that for. He also has an alt in here, you might want to PM that one as well. https://bitcointalk.org/index.php?topic=1206112.msg15600858#msg15600858