Help! Problem with an Mp3 player?

My little sister has this Mp3 player and its a Pink Nextar digital mp3 player, so earlier she came to me and said theres a problem with it, on the screen part it says "REC007.WAV", apparently she was trying to forward a song, and she did something wrong. any help on how to exit this? ive tried shutting it off and on, and also ive checked the sites support tab. Im not good with things like this, so any help is appreciated. thanks