Right click in content manager, open for edit in explorer, double click config text which opens in notepad, edit the line that says trainz-build to read 2.6 I think it is for 2006 save, close the explorer window and commit.
I think the problem you are having is just down to the build number which 2006 doesn't know what to do with. Never had 2006 so I'm just guessing from experience of backdating from TS12 to TC3. Newer versions of Trainz flag a build number higher than the version as an error, going by TC3 old versions don't flag it as an error it just doesn't work.
I think the problem you are having is just down to the build number which 2006 doesn't know what to do with. Never had 2006 so I'm just guessing from experience of backdating from TS12 to TC3. Newer versions of Trainz flag a build number higher than the version as an error, going by TC3 old versions don't flag it as an error it just doesn't work.