annalooby

Hi, First let me apologise - I have no technical knowledge and only found out what an mp3 player was last week. However, I have just been bought a Sony Walkman NWD-B105F - apparently it has drag and drop music transfer technology that should be simple but I just dont understand how I can put downloaded tracks on it. The idea of me having an MP3 player was to put all my music on to it for use in my car and not have to keep buying cd singles but just download the occasional track as i want it and put it on the MP3- I have managed to transfer all the music I have "ripped" (I think thats the right term!) from my existing cd collection and this works fine. Included in the pack with my walkman was a card giving me 10 free downloads from sonic stage. So I found 10 I wanted, downloaded them and can play them just fine in the sonic stage software on my pc but when i transfer them to my mp3 they dont show up or play. On reading the bumf that came with the walkman it seems this walkman doesnt use sonic stage....so why on earth did they send me the sonic stage download card with it???? I had also downloaded some tracks from Napster and these will transfer onto the machine and show up but when i try to play them they say file error. Please can someone tell me where I can legally download tracks that i can actually play on this player - if not I may as well ditch it! Thank you all - sorry if this is in the wrong place - technophobe