Can't Monitor Buss 2 On My 388

[Mark7]

I can record to track 2 (I checked, had to use the stereo buss for monitoring) and I can play track 2 back (again, through the stereo buss), but, for some reason, the signal from buss 2 isn't getting to the monitor buss. I guess i can work around it, but it is kind of puzzling. Any ideas?

 

[Mark7]

I can monitor every other buss, which makes it even more puzzling.