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).
(ocultar) Si deseas encontrar un adversario de parecido nivel de juego al tuyo, echa un vistazo en la página de Clasificaciones del tipo de juego que quieres y busca a uno con un BKR similar. (pauloaguia) (mostrar todos los consejos)