F11: Unable to print to HP LaserJet 4250

[Marco Guazzone]

Dear all,

Every time I try to print to an HP LaserJet 4250 printer, the result
is the following:
* CUPS says the job has been successfully printed (e.g., status "completed")
* instead, the printer does not print anything, it blocks and shows a
"Service Error" message; the only way to restore is to power it off
and on.

Note: With F10 the printer worked perfectly.

Moreover, if I try to print to another HP printer  (HP LaserJet 8000)
I have NO problem.

Here below are some details:
PRINTER DETAILS:
  Description:	HP LaserJet 4250
  Driver:	HP LaserJet 4250 Postscript (recommended) (grayscale,
2-sided printing)
  Connection:	socket://###.###.###.###:9100
  Defaults:	job-sheets=none, none media=iso_a4_210x297mm
sides=two-sided-short-edge
SYSTEM DETAILS:
  Dell Latitude D830
  Linux feedback 2.6.29.6-213.fc11.x86_64 #1 SMP Tue Jul 7 21:02:57
EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

Any help is very very appreciated.

Thank you very much!!

Cheers,

-- Marco