Music player on the Nokia Twist 7705?

[Popculture]

Ok, so I figured out how to transfer the music files to the phone, and I can clearly see that they're on my memory card. However, whenever I try to go to "my music" I just get a popup that says "not available." I have also tried to go to the file and click ok to have it played, but nothing seems to work.
Help, Please.