Thanks Tim. A tutorial would be great whenever you have the time, i'm not really used to these modern airliner's procedures! I am starting to think this is more of a FSX or installation issue as i followed the FMC tutorial here on the forums and also followed along the checklists and procedures in the manual as you said, with the same result. A/T didn't kick in at all, even after spooling up to 1.10 EPR before hitting the button. Do i have to own a registered version of FSCUIP for the 757 to run properly? or the latest version or something?