Guys I'm new to the EFI Live game. Trying to tune an A40 Allison 6 speed TCM and its not letting me. the truck is a 2006 LLY engine with LBZ controllers and trans etc. Its shifting out of 1st into 2nd really hard and when I come to a stop it goes into 4th gear and stays in it till I shut it off. How do I do these procedures? How do I even get it back to stock? Everytime I go to full flash it gives me a "Script exited with code $054C: Operating System is not present in file". and that's it. PLEASE HELP!