Jyri helped me to sove this problem.
It seemed to be an licensing problem.
Now it works! :)
Thanks again to Jyri!
If it was working before it is highly unusual for it not to work after an upgrade (I've never seen that happen). The only time I have seen that happen is when running under a service account (aka changing the LogOn property for the services) and then forgetting to do that after the upgrade.
I would suggest you contact your local analyst or the hotline as they should be able to help.
i updated from FFC 4.0 to 4.01.
Now i got the message: "Waiting for server initialization to complete. This may take several minutes."
There are many serveral minutes... :(, but no login.
I allready deinstall FreeflowCore and MSSQL Express, use CC Cleaner and made clean install on the machine.
At install there are no errors.
Install on Win7/64 SP1