HTC One RUU problem, help!
Long story short, I have an ATT htc one, and did the conversion to the Google Edition.
I am Soff, changed my CID to the google edition, and installed the Google Edition RUU.
Problem is now I need to go back to the way it was, Stock At&t. I changed my CID back to CWS__001, and downloaded the At&t RUU from Here
, and and used the download from the 2nd post. but when I try to run the RUU.exe from fastboot it gives me the ERROR 
"The Rom Update Utility cannot update your android phone
Please get the correct Rom Update Utility and try again"
What am I doing wrong?