You're already S-Off, why are you trying to unlock via htcdev.com?? To unlock via htcdev.com (which is not a complete unlock, unlike S-Off) then you have to be on the newest bootloader version. HBOOT-0.89.0007. I thought there was actually a link to the little RUU update that is just for the bootloader on the bottom of the walkthrough @ htcdev? It's been awhile since I played with one, but I'm sure it was there. If not, I can upload it. I am sure it's hanging around somewhere. But yea, unless you relocked it and stayed S-Off, all the htcdev stuff would not be needed.