HP Laserjet 6p does not print consistently with JetDirect print server (IP) - Printed fine as a shared printer (parallel)

Hi All,
I am Tech working for a school district full time and I am contracted out by a local township, doing work for thier computers and some networking.  I have set up IP printing on hundreds of computer at the school without hardly any problems.  But at the town building I am having a hell of a time trying to get a Laserjet 6p connect to a Jetdirect print server 170x via parallel cable to work consistently.  Previously it worked consistently as a shared printer connected directly to a computer (but of course the computer had to be up and running in order to print).  After I set up IP printing it sometimes works well, sometimes doesn't print at all, sometimes takes 10 minutes before it prints or prints garbage.  It is hard to troubleshoot because when I am there it will work after changes, but screw up later.  I set it up with a static ip address and I have the right driver.    I am using post script, but am pretty sure I tried PCL also.  Any ideas will be greatly appreciated.

Thanks,
Kelsey
KBraun92565Asked:
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caddladyCommented:
How much memory does the printer have?  The default shipping is 2mb - what type of documents are they printing?  Are they running out of memory?  I would switch to the PCL5 or PCL6 printer driver - they seem to be faster than PScript.

The 6P is only compatible with the JetDirect EX (External).

Where are you doing the spooling?  In a server or at the workstation?
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jburgaardCommented:
The printer used to work as basic printer, so focus is on network and esp. the 170x.

As far as I remember, the 170x has a rear button to print out network-stat's.
-or if you use the Jetadmin software, you prob. can see the same info from remote.
Are a lot of network-errors in these logs?

The 170x is a slow 10mb box, swap if possible.
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KBraun92565Author Commented:
I can see the stats and get to the web interface.  The netwotk is run by a Winsows 2003 machine and pretty tight with Group Policies.  The Windows firwall is controlled thropugh GP.  I noticed searching the web that port 9100 might have to be open?  What do you think?  Here is the site: http://members.cruzio.com/~jeffl/sco/lp/printservers.htm 

Thanks,
Kelsey
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caddladyCommented:
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KBraun92565Author Commented:
That did it.  I do not know how you found the solution, I searched high and Low........

Thanks,
Kelsey
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caddladyCommented:
Your Welcome :)
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