Source Identification with P70

I have a P70 AP controlhead. SPX 30 Course Computer.

I have a B&G GPS

I connected the GPS via NMEA 0183 to the SPX 30

I connected the P70, i60 Wind and i60 depth as shown in the manual and online using the proper coded cables to make a SeaTalkng backbone.

Nothing is taking to the AP

When I select source nothing. Or I get a message saying the SPX30 doesn't support that.

I tried to start the commissioning process over but the Commissioning menu will not appear on the P70

What am I doing wrong?

Thanks
Bill