i have bmw scanner 1.3.6 and cant get it to work its the rs232 version not usb although i have a usb to rs232 cable also, i have an issue my speedo is very jerky appears to be correct but isnt smooth in showing speed and like sticks when you slow down and takes a while to come to correct position, the unit has been opened so i presume someone has tried to fix the pixels, anyway i wanna program a 2nd hand cluster to go in and the software is aparently able to do it vin and odometer reading, and anyone know of a cheap e39 1998 528i auto cluster?