Server code: -34

Hi,
We imaged some computers with a base image but when the imaged computers
reboot, they are niot registering in ZCM.
When I try to register those computers manually, I receive thos error
message:

Server code: -34. Invalid Device Authentication Information.

I tried to uninstall then reinstall the agent without success. I also
deleted the GUID in HKLM\Software\Novell\Zenworks\PreAgent.
Anyone can help me with that ?