Hi all,Since last week I do have a strange error. When I use the level D 767or PMDG 737 747 and check the FMC with fuel weight and speed and so on, so far so good.So I taxi to the runway, and when I take off I usally arm LNAV and VNAV and the AP, even so the FD and the A/T. No problems, But then the AP is suddenly disconnecting and the plane is uncontrolled going down.I'm desperately reformat the partition installed everything all over again. But the problem still exists.Cheers, Teun

>Hi all,>>Since last week I do have a strange error. When I use the>level D 767>or PMDG 737 747 and check the FMC with fuel weight and speed>and so on, so far so good.>So I taxi to the runway, and when I take off I usally arm LNAV>and VNAV and the AP, even so the FD and the A/T. No problems,>But then the AP is suddenly disconnecting and the plane is>uncontrolled going down.>>I'm desperately reformat the partition installed everything>all over again. But the problem still exists.>>Cheers, Teun>> Have you checked to see if you joystick/yoke is properly calibrated? This is sometimes the cause for this problem.- John

With all the problems i had due to a faulty dvd r/rw,you might want to check your harware.Phill