Probably restating the obvious here, but make sure that you reprogram the CAN IDs on the Jags before plugging them into the bus. By default, the Jags all come with the same ID set. So, even if the termination is correct, you'll only see one of them. You can reprogram the IDs using the BDC_COMM application. Follow the getting started guide for details. BTW, you can get a complete set of working CAN cables w/ terminators and the RS-232 cable from
http://www.estoprobotics.com/estore/ if you're interested.
HTH,
Mike