can't connect jags to bdc-comm

[dbeckwith]

This is our first year using CAN, and the Jaguar Getting Started Guide says I need to update the firmware before I can use CAN. We have two grey and two black jaguars.
I plugged the CAN terminator into the right NET port on a black jaguar, then connected the left port to the CAN-Serial adapter I made with instructions from the Getting Started Guide. That adapted is plugged into a serial-USB adapter since none of the computers at my school have serial ports. When I run BDC-COMM, I see the attached screenshot. The Jaguar light keeps slowly flashing yellow. Any help? This is my first time using CAN, so any obvious fixes would be helpful too