Urgent printing problem

I can no longer print from HP-UX 10. All the printers are network printers. I have already stopped and restarted the spooler (lpshut and lpsched), but still the same problem. The printers react when I ping them.
I have also tried with SAM, but the system cannot find the printers.
Can somebody help me.

Are they disabled? as in use the enable / disable command.