Can't shuffle songs, or random mix??

I'm trying to Shuffle through songs, or play a random mix. I have it set up where I go into "music" in the folders I click on "/" and then it gives me a list of all my artists with folders. And i click on the play/pause button to play that artist when highlighted. I've tried going to "random" in the menu while the songs are playing, but all that does is replay the song. Is there anywhere to have a random shuffle of songs on these mp3 players. I have the 1.5" lcd 2gb. Thank you