I just bought the Treo 600 yesterday and am also a computer novice. So speak slowly and clearly please...

I transferred music from Windows Media Player to an SD card via a card reader using the "Sync" operation on the Windows Media Player window. When I put the SD card in my 600 to play the songs using PocketTunes, I only see a file named "Palm" and "launcher". Nothing happens when I select any of those files. I was hoping a window would open to show me the 2 test songs I had transferred. My Treo recognizes my SD card, but does not show the songs I want to see. Do I need to format the SD card first? Do I need to create any directories for the music to go into? What is the root directory and what do I do with it? I feel frustrated and stupid, but don't know where else to turn. I would greatly appreciate any help you can give this new Treo girl! Many, many thanks!