I just bought the Cat Eye Wireless with cadence and can't seem to get a signal. I ran the sync test: everything okay. Rolling the wheel sounds the dim click as the magnet passes the sensor--same with the cadence magnet. To those who use this unit, what might be the solution to the headache? Could it be the battery in the sensor? I've tried everything. I need it running by this afternoon: going on a 40 mile ride and would love to test it out.