Album artwork from itunes not importing to Traktor

I remember a long time ago I had some software that was great at managing artwork, but if I took my tracks somewhere else (other PC or something) without the software half of it was gone suddenly.

Don’t have a clue how that works in iTunes as I make it a point to NOT use iTunes for my DJ-stuff :-).

Hope someone will be able to help you on here.

Greetinx.