Why can I no longer record ESPN or ESPN2 on Xfinity TV (NOT streaming)?

I am no longer able to record programs on ESPN and ESPN2. When I hit record, I get this message: "Record is not available Channel subscription required to record channel." I am NOT streaming, but watching TV. I can watch the channels (since they are included in my subscription), but I no longer can record. My DVR is NOT full (24%), and I am able to record other channels, including ESPNU.