HIGH UTILIZATION

We upgraded a server and things went well until we had set up a number of PC’s to print to relevant Q’s. Processor Util would stay at about 38% and would not clear until server was restarted. The problem only occurs when connecting PC’s to printers (capture required for old applications).
Configuration as follows –
Netware 5.1 + SP2a
IP and IPX
Replica on server for bindery emulation and context set correctly
JetAdmin cards have recently had firmware upgraded
Netware client v3.3 sp3 installed on PC’s

Would be grateful for any ideas