OES11 SP2 fully patched - GW 2014 R2 HP1 - KDE4 as Window Manager - Firefox as default browser.

System runs fine so far, but the gwadminconsole-launch.sh script doesn't start.

A window pops up for 0,2 sec - "Please wait while browser is launched..."
When starting script from console the same window for that short time pops up and exits with
Code:
/usr/bin/zenity
on console.
There are no further error messages.

What I tried so far:
  • Deleted the home folder from another user and tried it with a new profile
  • Uninstalling and reinstalling zenity
  • tried another X-Manager (Gnome, ICE WM)
  • reset firefox to default browser
  • changed default browser to konqueror


No luck. Behaviour is as described above.
Any zenity cracks here?
How can I launch the script?