Samsung Galaxy S – authorization for setting up a WLAN or certificate installation

Hello everybody,
had the following problem:
After a change of my Samsung smartphone I could not get into Uni-WLAN and got said display when trying to set up access.
Clearing the authorization memory (do not know if that was necessary) and enter my (time allocated originally, but no longer in use) password to unlock my lock screen was done the whole. Now I came back into the setup mode for the Uni-Fi.