jivago, if it is a true branded at&t touch pro it is gsm device. if you got it as is, previous owner had it unlocked and flashed sprint cdma rom which is the only place the .40 locker comes from. it wont boot because it has a cdma rom on it. the gsm bootloader/locker is 1.90.0000 and the unlocker is 1.90.olinex
http://www.forum.xda-developers.com/...d.php?t=410150 also check
http://www.forum.xda-developers.com/...d.php?t=448008 and you may need to ask in the forum section there under gsm touch pro fuze section for stock rom since htc site doesn't have it posted or go to at&t store and have them flash stock rom for you.