Getting Error message ""This set top box does not match the account settings"

Just ordered a new wireless receiver for the bedroom. Installed it and now getting the following error "This set top box does not match the account settings". Service was suppose to be enabled on Monday the 4th, but I recieved the hardware early and turned it on. I've since rebooted and unplugged and tried everything to no avail. Any thoughts on how I might get this to work?

Regards,

  Rick