By Rescue Media created USB could not connect to Wifi

For security reasons I created a bootable USB pen (Emergency media)

I booted with the pen, saw my Wifi networks listed, could not connect.

I was prompted to enter the Wifi password. Wrong parameters.

Using the option in the dialogue box SSID, etc, did not work

because my AP has the Security Option WPA2-PSK[AES]

The dialogue box does not offer this option.

So no Wifi connection.

What shall I do?

-Reinhard