Can't coneect to ECM??

[Houston Ben]

Hi all,
With schooling out of the way I decided to try and config my 6L80 to the specs found in the THE TUNNING SCHOOL TRANSMISSON GUIDE. I successfully uploaded the file and it was running fine and I was logging. I stopped logging and not I can't connect to the ECM and my transmission is acting up making it slip. When I uploaded the tune for the transmission, I skipped the upload for the engine as I did not need it.

When I try to log a tune through the VCM scanner I get this ERROR:

"Unable to detect vehicles diagnostic protocol.

It's possible that this vehicle isn't supported yet by VCM Scanner. E-mail support@hptuners.com so that we may add it.

Another possibility is that all controllers (VCM's) in the vehicle are not responding for various reasons."

Anyone know what I can do to correct this? I have removed the power from the battery, I have unplugged the ECM, I have unplugged HP tool and tried again, no luck on any of it. The HP tool is getting power and will occasionally blink that it is busy.

Thanks for any help

Ben