WP8584 on Private APN


I’m trying to use a WP8584 on a private APN.

when I put a prepay or account SIM in and connect to ‘internet’ all is well, connects to rmnet0, all works well.

when I put a sim in that connects to a private APN I get this. That sim works in other sierra devices.

Any bright ideas ?

I presume you are setting any username and passwords that are required for the APN as private APN’s quite often require them?