what Geoffrey means is, that you can´t update the Firmware with the Software GS-Training-Gym.
Please install the Software GH-615 PC which comes with the watch on the CD. With the GH-615 PC Software it is possible to connect with the PC. When you will have updated the Firmware, you can use the GS Training-Gym Software, Version 1.8, which is not compatible with the old Firmware. This is your problem. You are trying to connect the watch with old firmware and new PC-software.
The watch is very good. I won´t miss it anymore.