Cloned XP Pro says it is an illegal copy.

I have an engineering station that needs to be cloned to a newer station.I ran Ghost 10 and moved clone over to new station and then ran repair to have it install all new drivers. It came up just as all the others I have done BUT this time the OS says I an running an illegal copy? It is an OEM from Dell as all our stations are from Dell. I can’t seem to clear. Has anyone seen this before?