Hi there,
 
Just wanna start by saying....long time user, first time poster...
 
I tried to do this in an effort to unlock my bootloader, and was given a code 173 Check Fail Rule w/ exception.
 
After being on the phone with HTC for about 2 weeks now, turns out that the EVO 4G is not providing the correct encryption in the Identifier Token and is being rejected.
 
Now, I'm not sure if I'm the only person having this problem....but it is aggrivating to all hell since it seems now I cannot root my phone.
 
Maybe I'm doing something wrong....if I am, OP please assist!