How to organize the music on my new RCA m62 series mp3 player?

I downloaded the music, opened windows explorer, imported it into the music folder in my mp3 player, and it plays on the mp3 player but it won't organize. For example, i hit MUSIC>ARTISTS>And it just says unknown artist. And I have two different bands in there. Windows media seems to know what it is. Then I go into unknown artist and where it should say Marilyn Manson it says y******* replace the asterisks with a bunch of intangible chinese looking characters. I go into that heading and it lists all the songs, and they play like they should, but they appear as a bunch of chinese characters. It's completely disorganized. What do?