ok guys,

I tried the following :

I switched off onboard audio again. Then i switched off all devices under the Windows Mixer Play/Record except those of the VS-100.
Then I removed all .ini files of both Band In a Box and RealBand and rebooted the system.

I started RealBand and after closing the [Midi Drv dialog] twice I got a termination error again.

Now when I started SONAR after this it reported no audio drivers on the system anymore! The driver dialog was all empty. I had to reboot my PC to get them back.

Does anyone of you still have an idea where to look at now?

Thanks in advance,

Valentino