Hi, Not sure if i'm posting in the right place so forgive me if i'm not: My issue: After my first few flights in the excellent NGX my autopilot stopped engaging. I tried everything, making sure both flight directors were on, making sure aircraft was trimmed with no control inputs, cycling a/p on and off but no joy! So I re-installed fsuipc4, no change! I re-installed NGX and bingo...it started working again! Now after 3/4 flights it won't engage at all again. I've tried the exact same flights with when it was working, with fair weather, light load, balanaced trim...but no joy! Has anyone else experienced this? Can anyone tell me what might be wrong? Any help would be appreciated as this is killing the experience for me. [ps I have a v.modest system but I've managed to get an acceptable balance of settings that make successful flight v.enjoyable...thankyou PMDG + testers!] Many thanks,