Can't connect to MR3020 over wifi

I recently purchased three MR3020 devices and installed PirateBox on each device. They all worked successfully on the first go. Later that day I turned one of them on no one could connec to it over wifi. The network was available to see but no one could connect. I tried changing the mode via the hardware switch a few times and now when I have it on AP mode not even the wifi light is on.

I can connect to it when connected via cable and I go to 192.168.1.1 but can't connect any other way.

Can anyone help with this? It's the same situation with all three devices.