Yeah! now it works! I can load the demo without floating exception. Thanks to Urkle for fixing this issue.
There's only a little mess with the sound. First time I started there was sound, but since my amarok was running I quitted and closed amarok just to start the Demo alone again.
Since then I receive positive shell output
but no sound at all in the demo.
Other apps still run with sound, so it seems not to concern the sound engine itself but the demo.
I'll inform your about any progress :-)
Thanx and Greetings again,
Homer