747 Cabin Pressurization System Help

I am flying the 747 for the first time in a very long time.

I noted that the cabin pressurization system is indicating a Cabin Alt of 0 and I never saw it indicating anything but zeros when climbing, too.

Is there something I missed in configuring the aircraft that would have allowed this to work? I’m getting no warnings for Cabin Pressure issues, either.

Screenshot 2024-09-10 103533

Screenshot 2024-09-10 105631