Hi all,

This is my very first post on a flight simulator forum although I am not new to FSX. I have been flying for nearly two years with at least 2 hours or flight per day using other famous aircrafts such as 767, 747 and MD11 to name a few. I usually read as much as I can the procedures manual before flying an aircraft for the first time or I use video tutorials when available. So I really try to find a solution to any issue. But this time I have no answer so I decided to post a query on this forum hoping that somebody would help me. My problem is simple : I have recently bought the CS 757 pro pack and 757-300 package but the AP does not work at all. I have followed all the before take off procedures (IRS alignment, engine start, FMS programming, etc) but after take off, the aircraft just keeps on flying on manual although I pressed the CMD, LNAV and VNAV buttons. Just as if no buttons were activated... This is very frustrating... What am I doing wrong. Many thanks for your help. Luis