ES97 and Quantum Radar Wifi won't connect

Hello!
I've installed a brandnew Es97 MFD together with a Quantum wifi radar.
1.
I cannot connect both devices via Wifi without changing the wifi encryption settings: I've got to change the wifi settings to 'no encryption' . This means that the wifi MFD connection is open, without encryption.

This is the only way to connect both devices.
When a connection is made and I change the wifisettings back to WPA , then the wifi connection between the radar and the MFD is lost.

My neighbour in our harbour has got the same configuration, and exact the same problem.

2. When I want to connect the RayRemote app on my iPad with the MFD, the same problem occurs: it will only connect when the MFD wifi settings are changed in 'no encryption' .

I've updated the MFD to the latest verion.