Ok, I am using FS9 on XP. I have an empty plane with fuel in the wings set at 100% and in the main fuselage set at 85%. As reccomended in the Concorde SST file. I follow this file properly, not missing out any steps so that it should work. The CG is fine when I take off, and after about 1 minute of climb (just over 3500ft) it slowly starts to veer off to the left. It is the uncontrolable. I have the up-to-date flight dynamics, and by using both the FS2002 files, have managed to control this, however, they are the 2002 files, and not the 2004 files.