hpssd does not start

[Peter Lesterhuis]

Hi,
Since upgrading to FC4 my hpssd will not start. During booting there is 
an error message. The same message is displayed when I type:

$ /etc/init.d/hplip restart
rm: cannot remove `/var/run/hpiod.pid': Permission denied  [FAILED]

Stopping hpssd:                                            [FAILED]
Starting hpiod:
touch: cannot touch `/var/lock/subsys/hpiod': Permission denied
Starting hpssd: Traceback (most recent call last):
  File "./hpssd.py", line 50, in ?
    from base import async, utils, database, status, pml, slp
  File "/usr/share/hplip/base/database.py", line 38, in ?
    import device
  File "/usr/share/hplip/base/device.py", line 39, in ?
    from prnt import pcl, ldl, cups
  File "/usr/share/hplip/prnt/cups.py", line 38, in ?
    import cupsext
ImportError: No module named cupsext
                                                           [FAILED]

I looked for the module "cupsext" and it seems to be there:
$ locate cupsext
/usr/lib/python2.3/site-packages/cupsext.so
/home/peter/downloads/hplip-0.8.8/prnt/cupsext
/home/peter/downloads/hplip-0.8.8/prnt/cupsext/build
/home/peter/downloads/hplip-0.8.8/prnt/cupsext/build/lib.linux-i686-2.3
/home/peter/downloads/hplip-0.8.8/prnt/cupsext/build/lib.linux-i686-2.3/cupsext.so
/home/peter/downloads/hplip-0.8.8/prnt/cupsext/build/temp.linux-i686-2.3
/home/peter/downloads/hplip-0.8.8/prnt/cupsext/build/temp.linux-i686-2.3/cupsext.o
/home/peter/downloads/hplip-0.8.8/prnt/cupsext/setup.py
/home/peter/downloads/hplip-0.8.8/prnt/cupsext/cupsext.c

But perhaps it is not loaded.
In FC3 hplip, hpssd and hpoj worked fine. 
I can still print, but print-configuration-settings are hard to change.
My printer is a Hp psc-2410.
Does someone know this error? Could someone give me a hist how to solve 
this?
Peter.