APX 120- Not detected

Hi friends,

we have bought a apx120 Access Point for our Sophos XG135 Firewall
and have trouble to install it.

What i have done so far:

Gave Port 5 a new IP address, tried Lan and Wifi as Network Zone.

Set up sophos DHCP for this Port, Gateway is the interface. APX get's an ip address, but i can't ping it,even from diagnostics.
I can ping the interface ip.

Wireless protection is on for Lan and Wifi.Also in zones it's activated.

Made a firewall Rule for Outbound Wan. I can see that the Port 5 is trying to reach some internet addresses.It's allowed.
Can't see any rejected packets.

The interface status shows unplugged. When i reboot the Sophos or the Access Point, it shows connected for a while.

Firmware is SFOS 17.5.11 MR-11.

Edit: Found out in the logs this entry :[Unknown] unknown AP model encountered: APX120, dropping

Edit 2:Never Mind :-) After updating the patterns, it was recognized

Best Regards