Problema on hp fficejet k550 dtn

Hi all, I've buyed a HP Officejet pro k550DTN and I've configured it
using ptal-init setup.

psala@psala-lx2:~$ ptal-devid
MFG:HP;MDL:Officejet Pro
K550;CMD:MLC,PCL,PML,DESKJET,DW-PCL,DYN;CLS:PRINTER;DES:HP Officejet Pro
K550;SN:MY617320WM;S:028080A880001000810002000300040005056605f705e805b;Z:031;1284.3M:f7f,f7f;1284.4DL:4d,4e,1;

psala@psala-lx2:~$ ptal-print < /dev/null
ptal-print: connecting to device "hpjd:192.168.70.91"...  successful.

psala@psala-lx2:~$ ptal-hp device
Model name:        HP Officejet Pro K550
Model number:      C8158A
Serial number:     MY617320WM
Firmware version:  20051208 SPP0009C
Firmware datecode: (unavailable)

psala@psala-lx2:~$ ptal-hp clock
Device clock: Feb-21-2006 10:04:43 AM

The only command (except ptal-hp display that doesn't work because the
printer have no display...) that fails is

psala@psala-lx2:~$ ptal-connect -service ECHO
ptal-connect: connecting to device "hpjd:192.168.70.91"...  failed!

Furthermore I've installed the printer using cups using the port
ptal:/hpjd:192.168.70.91 and the driver hpijs I've found on
linuxprinting.org.

Well, if I try to print a test page I can find the job in the completed
jobs as aborted.

Can you please help me found how can I solve the problem?

Thank you very much

Piviul



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