Flash Operator Panel not displaying DAHDI trunk activity

I have a fresh install of PiAF with Asterisk 1.6 and FreePBX 2.7. I am using a Rhino 4 channel FXO card. The system does receive and make calls on the Analogue Trunks, and those trunks do show up in FOP as Dahdi 1 through 4 however, FOP doesn’t display any of the activity on the lines. It just has a red light.

FOP correctly functions for extension (both remote and internal) as well as for SIP trunks.

Any ideas how I can correct this?