Sorry you can't seem to get the old one working. Like Spiff, Cateyes are the best I've used. (Although the Astrale with 25,000 miles on it has developed a sporadic contact issue, requiring semi-annual cleaning and greasing.) My Cateyes don't suffer water intrusion and short out, I've had good luck with the cable harnesses, etc. And I've used them in some gnarly weather!