Cannot Resolve Host Name

I am running LexMark MarkNetPro-3 print servers on my AIX network. All of the sudden, none of my printers will print anymore. I am getting an error message on the console:

Unable to resolve host name.

This message comes up everytime a user submits a print job.

Any Ideas?

Did you check the configuration of the lexmark printer server.

Once i had the same problem, suddenly the compleet config of the server where mixedup