Need help!?

I got my mp3 for christmas last year. i have just put some new songs on it again and played them on it but they only play for 10seconds then go to the next song. there is a symbol at the top that say "pre" with three rectangle shapes underneath it how do i get rid of it and listen to my songs all the way through!? please help me!! the make is iitronics and is a 512mb imp-11 if that helps?