Hi there,I've had the same problem in the past with the PMDG 747X. I went on YouTube asking everyone if they've had it too and how they fixed it. One guy said I have to download the MagDec 2005 update, but when I did, it made no difference.After a bit of experimenting, I found that all you have to do to correct this is run an FSX repair, and if you have the Acceleration Expansion pack run a repair on that also. After I did that the 747X followed the localiser precisely every single time.Hope this works for you, and not just my pc. :-)Nathan