I need help!

After two years of smooth running my Flight Deck 6501 started displaying a pattern of 111, 222, 333, etc. after a ride in the rain. I finally had to pop the battery out to stop it. I figured that I might as well replace the battery since I had to reprogram the thing anyway. I also replaced the battery at the wireless transmitter end. After reprogramming I was able to get speed and cadence but not distance, max speed, avg speed, etc. After several frustrating attempts I bought a new 6502 (head only) on eBay. With it I got the same result (except that the programming would only show 1 front ring or 3, not the 2 I desired). The older unit at least showed the double ring and gave me the proper cadence. I looked under the rubber hoods and I'm not sure what I'm looking for. The buttons (both A on the left and B on the right) work fine from the handlebars. I took a pencil eraser to the contacts but the results are still the same - speed but not distance. It's getting annoying (not to mention I bought the 6502 that I don't need - anyone interested?)