I bought the revlight tach sensor from datatool back in Dec. of 04.and it worked fine until a couple of days ago. It will not reprogram the light will stay on the first green led then cycle through all the leds. I unsoldered the wires and checked the wires for nicks then resoldered them and it still does the same thing. It will seems to be stuck in a program mode.Tried a number of times to reprogram and it will just cycle throuh the leds then stay on the first green led then after a while continues to cycle again. HAs anybody got any experience with this product. I emailed datatool and still have got no response