Randomly shuts down while playing

So I was able to load songs and all that fine, but now when I try to play songs, after a certain time it just randomly shuts down as if it reset itself. When I turn it back on it’s as if I never played any music so it’s not like it’s going to “sleep.” Also the battery power shows it’s full.

How do I fix this?

Message Edited by ilendil on 12-24-2008 06:00 PM