My friend gave me her RCA Lyra 1090A MP3 player to put some music on. She's without a computer right now. At first I plugged it in and it showed up as a drive. No problem. Then I dragged her music off of it and backed it up on my hard drive. Still no problem. Then when I went to drag some new music on to it the Finder locked up and I was forced to restart. Now the Lyra doesn't mount at all. Does anyone know what may be causing this and how I can succesfully put new music on the Lyra?