2009 gmc seirra remotestart

I have installed a autostart AS-2471 with a nexgen dball wired D2D it as per xpresskit GM6 v.2.29 with the rf loop but it will not crank I can start it and pull the key out and it will stay running but it will not crank over the autostart says it is running and the accessories work.I have checked the wiring more than twice,any help would be appreciated.

when you try to remote start it, does the light flash on the dball?  when you try to remote start the truck does the theft light flash?  have you tried unplugging your rf loop and inserting the key without turning it, then pressing remote start?   You could try w2w the tach signal and relearn it to the autostart.