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
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?