OK something weird is going on here. I rec'd my replacement today... Set it all up and same thing !!!! I've used BOTH magnets that they supplied. The magnet is registering and though the picture here is slightly blurry. Rest assured that magnet is as close as you're going to get. The cadence transmitter is as close to the front as you're going to get AND the main computer is on the stem. Taking both placements into consideration, its a few inches less to transmit in these locations ! I'm really scratching my head here.

Could it be that I have my iPhone with me that knocking out the signal ? Could it be that my pedal is aluminum? Clutching at straws here. Everything is installed correctly.. Heart and speed works fine.. Its just the the cadence isn't. This is the 2nd unit I rec'd to replace the first.