I recently uploaded some albums on my computer and put them onto my Ipod. After uploading them onto my computer and imported into itunes, i deleted them . Now when i go to listen to certain albums it tells me it can not be played due to itunes not being able to locate the original file. However, I can still play certain albums, what do i do to get the others to play? They all play fine on my ipod but still I want to play them from Itunes.