I think I figured it out.
I was looking at my download folder and I found the problem.
As I mentioned I had used the htcdev method on another phone in the past. When I copied it to the /usr/bin/
folder I just used the command line copy command and used the filename for the attachment to the email I received.
I was looking at my download folder and saw that I had two files: Unlock_code.bin and Unlock_code(1).bin. The first one was leftover from when I did the other phone. I moved the second one to another directory and renamed it Unlock_code.bin and copied it to /usr/bin.
Success!
I was looking at my download folder and I found the problem.
As I mentioned I had used the htcdev method on another phone in the past. When I copied it to the /usr/bin/
folder I just used the command line copy command and used the filename for the attachment to the email I received.
I was looking at my download folder and saw that I had two files: Unlock_code.bin and Unlock_code(1).bin. The first one was leftover from when I did the other phone. I moved the second one to another directory and renamed it Unlock_code.bin and copied it to /usr/bin.
Success!