I have a 4gb Ear

Question

I have a 4gb Ear Gear 4th Generation Multimedia Player. I transferred about 700 songs from my computer but when I turned the player on to start enjoying my music...only 128 of the 700 songs will play. When I open the player, it shows that all the 700 files are there. All the files are in MP3 format. The only software that was provided with the player was a video conversion program. Other than the music, there are no other files (video or photo). How can I get all the songs I transferred to play? Thanks for any advice you can offer.