illegal programming address

I bought a diablo sport predator u7193 from a guy online for my 2003 chevy 2500hd 8.1l it was vin locked and out of date so he sent it to diablo for hardware update and vin reset. i got the diablo in the mail today and have tried multiple attempts at installing the diablo tune and the 87 tune and both times when writing it gets to around 5 or 6% before saying "unable to read vehicle type" so i tried to just change my tire size with factory tune and it gets to around 3% then says "illegal programming address....."