Bought a FAST XFI off a board member with the casper harness. I have all the lights on the casper box lit up and i have power light on on the xfi. The CRANK light and SES light on the dash flashes on and off steadily probably twice every second. I cant get my laptop to connect to the xfi at all on any of the COMS, it just says no ecm found. Am i doing something wrong or missing something. Any input would help. Thanks Bryan