Hi Turkijan1908,
Welcome to our Community and thank you for posting.
We only offer support here in English so I hope that's ok. If you prefer a response in German you can contact us on the German Community.
From the information you have given us I think that the bank account might be deactivated temporarily. If the confirmation code has been entered incorrect 3 times this will deactivate the bank account. We can resolve this very easily if you could contact us :). You can use the 'Help & Contact' link at the bottom of each page, Twitter @askPayPal or Facebook.
I hope this information helps.
Dian
