Need help from OT HVAC Experts

I have a carrier HVAC system with the comfort zone II zoning system. I have 4 zones:

Zone 1 - 1st Floor
Zone 2 - MBR
Zone 3 - 3 spare bedrooms
Zone 4 - Basement

When I program the thermostat, everything seems fine. My issue is that when I look at zone 4 on the thermostat, it says "OF" for off. I can set it during the program mode, but anytime I try to run the system, zone 4 says "OF". My question is how do I get zone 4 to actually work?

Every other zone works as advertised. I thought that there could be an issue with the damper, but I tested the system out in install mode, and all the dampers work (meaning when I cycle through the zones in install mode, the applicable zone's damper is open when the rest are off). So the dampers work. I then switched the remote sensors from zone 4 to zone 3, but the problem didn't follow. I checked the wiring to make sure all the connections were secure, and they are.

Is there something simple I'm missing that lets you turn off a zone or turn it back on? The manual says put the temp all the way down and "OFF" will show. And then put the temp to a normal number and it will be back on. That isn't fixing the issue for me. Any help is appreciated.