AP 10 not recognized

Hi all together,

I'm using a UTM 9 home edition and try to get an AP10 working. How ever I read a lot of tips, reset the configuration, re-installed the system and setting up the settings manually again, no success.

My setup:
- UTM 9 to current release
- setup with dhcp on iternal interface
- connected the AP10 to the internal interface via switch
- all Firewall rules disabled for test

So the AP 10 gets an IP, I can ping the AP 10, and when I open a ssh session to AP10 it also works and asked me for login data (does anyone know the default login credentials to the AP 10?) but even what I did, the AP10 is not recognized at Wireless Protetion settings at pending APs. I do not know now what els to be done to make it work. Does anyone git an idea?

with little hope and best regards

Woody