Desktop printer Utility is not currently supported under Mac OS 8.0. Therefore, if you are running Mac OS 8, this error message is correct. You should upgrade to Mac OS 8.1 or later for access to Desktop Printer Utility.
If you are running any other system software version such as 7.6.1 or 8.1 and you encounter this error message, be certain you have the desktop printer spooler and desktop printmonitor active in the extensions folder. Having these extensions disabled will cause the misnomer to occur.