I read a file from a 2008 cm2100 ECM and converted the file to csp5 did some editing and flashed the file in. After installing the csp5 switch I proceeded to take a test drive but no go. So far I have checked the files a second time to ensure correct VIN and that both v7.5 and v8 said "ok to flash". I have unhooked the batteries and tried but still no communication. Snap-on scanner reveals no comms with ECM and several other modules with ecm comms dtcs. I have checked power and ground to to the ECM on c2 pins, 45,49,50,60 for 12v and pins 47,48,57 for ground. Also checked can + and can - circuits between ECM and TIPM all checks good. Any other ideas and also can I get the VIN License replaced if we end up with a bad ECM that needs replaced?

thanks
Trent