Ok, try adding to iTunes a different way. First of all, find out the location of your saved folder. In LW tools > options > saving shows the location.

Now in iTunes, go file > add file to library. Browse for your saved folder & then add files that way...does the ! go away? It should.

Another way to do it is by opening that saved folder (using Explore, like I told you earlier on) & playing a song with iTunes. Right click on a file in the saved folder > open with & choose iTunes to open the file. That should also add the file to the iTunes library. But it's a slow & clunky way to add songs!