Can't start HP Device Manager.

Hello,
I can't start HP Device Manager application (/usr/hplip/toolbox). I get
following:

[root@xxxx ~]# /usr/hplip/toolbox
 HP Linux Imaging and Printing System (ver. 0.8.2)
 Toolbox/Device Manager ver. 2.0
 Copyright (c) 2003-4 Hewlett-Packard Development Company, LP
 This software comes with ABSOLUTELY NO WARRANTY.
 This is free software, and you are welcome to distribute it
 under certain conditions. See COPYING file for more details.

 Running new hpguid instance...
Traceback (most recent call last):
  File "/usr/hplip/hpguid.py", line 41, in ?
    import base.async_qt as async
  File "/usr/hplip/base/async_qt.py", line 85, in ?
    from qt import *
ImportError: No module named sip

Then I press ^C to stop application a can see:

Traceback (most recent call last):
  File "/usr/hplip/toolbox", line 57, in ?
    time.sleep(0.5)
KeyboardInterrupt


I use Fedora Core 3 with:
python-devel-2.3.4-11
PyQt-3.13-1
cups-devel-1.1.22-0.rc1.8
net-snmp-devel-5.1.2-11

During installation I followed those instructions:
http://hpinkjet.sourceforge.net/install.php .

Any idea what is wrong?

Thank you.

Josef





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