Are you getting a corresponding fault code? What OS do you have? Are you using the most recent Xerox Driver?
I am printing to the Xerox AltaLink B8055 printer via direct IPP.
When I send the job I get a succesfull-ok response.
However the printer never releases the print job.
The status is "Deleted" with the reason: "Network Controller Error".
I have the latest software version installed.