Sansa Clip and Windows Media Player

windows media player could not delete an album/file from the clip so i deleted it using the computer.  now when i look at the contents of the sansa’s external memory using window media playter the songs on the album are still listed, but not on the sansa clip display.   Question:  how do i get windows media player to show what’s really on the sansa clip?  It would be a major inconvenience to not know what’s on it since i use windows media player to load the sansa clip.  Thank you.