Bought one of these things last year. Many problems downloading some information but eventually got it sorted. Another problem or am i stupid i have tried to activate the second bike speed settings when i teach the new sensor and go through the procedure the unit say that the sensor is ok(with another speed sensor) for my summer bike but the unit always defaults to the bike one setting. Anyone have the same problem or can anyone help. If not i may get in touch with polar if i am found not to be stupid after all.