Why wont my Trigno Base Station recognise my new EMG sensors?

In order for the Delsys Trigno System to operate correctly, the Sensors need to be paired with the Base Station using a control utility in the EMG works software. The latest version of the software (EMGworks 4.1.7) requires the Trigno base station and all sensors to be on the latest firmware. The latest firmware is loaded onto the sensors at the time they are obtained and thus require the base station and other sensors are on the same firmware and they are using EMGworks 4.1.7.
The process of updating both the software and the firmware can be found on the following site: http://www.delsys.com/update-software-firmware/