I did a firmware update to 3.3.3.
But I cant change the AP Settings: SSID & AP Password & AP Auth Mode (after switching to "Show").
Than I tried a little bit and saw an error message on top of the configuration site, someting with "SSID...". Cant read it completely, because the error message disapeared to fast.
I let the SSID name unchanged and try to set only a password and AP Auth Mode. But that dont work. Than I tried only to change the AP Password and it worked! After that, I change the AP SSID and it worked too. And than I could change the AP Auth Mode.
Now all my changes are applied.
But I think, there is something a little bit strange with the configuration of the Wifi-Link AP