A driver object is associated with a server.
If the association becomes invalid for some reason, it is indicated by one of the following:
To resolve this issue, you must disassociate the driver object and the server, and then reassociate them.
Log into iManager and go to the Driver object in the DirXML Overview. Use the icons to remove and then add a server to the server name list next to the driver icon. Removing and then adding re-associates the server and the Driver object.