Hello all,
I found it:
the troublemaker is the ati-displaydriver! I installed the MSI R3650 MD 512. Then I deleted FL completely.
After installing FL new this mysterious message came up:debugger detected...
Without the displaydriver FL comes up, but does not run, as it needs a 3D driver!!!
I think this card is not able to use ist for FL!
I forgot this installation completely when looking for a debugger!
Thank you all for this discussion.
Blacky