WinXP and HPLJ4000n

We have an NT server based network with Win98 workstations. Three workstations were updated to WinXP and now unable to access network JetAdmin controlled LJ4000n printer. Found HP reference for installing this printer via local setup and TCP/IP port identity. Wizard works fine, however, system indicates ‘printer driver was not installed’ and then won’t go any farther. Have new XP drivers, and they don’t make a difference. Microsoft doesn’t have anything in the knowledgebase for this OS/Ptrissue. Attempted to use both 5pcl and 6pcl drivers, no luck. Any suggestions greatly appreciated.