I missed to install the Wallet 2.4.0 - means i went from Wallet 2.3.0 direktly to version 2.5.1.
I recognised that my amount of Iota has gone, so i installed version 2.4.0 to move the IOTAs to a new Seed (which is automatically started by the software).
But the amount after 200 generated adresses is still 0.
Anyone an Idea to restore my Iotas? - very much appreciate your help!