I am using the 737 800 PMDG, and have the following problem when programing autoland on my FMC - and 737.The whole procedure runs fine, the aeroplane makes the correct approach, follows the glideslope, flairs fine, but only problem left of the runway.Now the ILS shows correct indication to turn right to align with runway, but the autoland/autopilot does not do this, does not align the aircraft horizontally.Nav 1 and 2 are on the correct ILS freq. Have tried 3 different airports, Seattle, Kennedy and Heathrow, and all have the same problem.ILS is showing correctly, but the aircraft does not adjust with the ILS to align up for straight final approach.Please any suggestions? On approach, I have it on APP and CMD A & CMD BSee message in panel, Singel Channel.Can not turn on VNAV during the approach, and LNAV is off.