itunes isnt able to find the songs on the path that was defined before. there is a function in itunes to search for all available data on your disks ans put it into the library. this could solve your problem - if the songs can be found somewhere on your disk(s).
(gem) Hvis du vil hilse på nogen, på deres eget sprog så prøv vores "spiller ordbog" under "mere om sprog" linket under flagene. (pauloaguia) (vis alle tips)