[puff601]

hey man, i had the exact same issue trying to unlock my sprint tp2. this is what i did...

1) hard reset your tp2. when it tries to boot for the first time, pull the battery out and put it back in.
2) now press and hold "volume down" and "power" to enter bootloader
3) plug the tp2 to the usb cable. at the bottom of the screen it will say "serial" then change to "usb". this means its connected to the pc and ready to unlock.
4) open the hspl, and everything should run smoothly now

for some reason it seems that my tp2 would not unlock until i tried the hspl on a fresh rom that has never even booted/ran customizations for the first time.

also something else to consider... make sure you use the htc usb cable that came with your tp2. i have a 16ft belkin usb cable with a mini usb adapter on the end and it will not work when i try to flash roms, i have to use the htc cable or my tp2 always loses the connection to the pc. i hope that helps. so try to use the htc cable and hard reset without letting the tp2 boot for the first time. i think that should solve your issue. i see you also have a sprint tp2 so i really think that will work. let me know. feel free to send me a message if you still have trouble.