Reply to iTunes Tagging/Traktor's iTunes Folder

I am one of those people who changes each song's tag once it uploads into iTunes. I was wondering why even after I have changed the song name info, artist info, track genre, album art, etc...that same info that I've already changed in iTunes won't be applied to my Traktor's "iTunes" folder. Does anyone know the reason for this/solution for this? All the help is much appreciated!