SD Card remains "empty"

On the player itself you can’t find the songs, or do you mean when you connect the player to your pc you don’t see the songs in your player on your pc?

How did you add the songs to the card? Did you check to make sure the songs are on your card?

Did you insert the card while the player is off? did you insert the card in the player until it clicked into place?

Did you try to navigate to MUSIC> folders on the player and see if your songs are there?

Are your songs properly tagged with ID3 V2.3 ISO 8859-1  tags?