m230 - unable to drag and drop MP3's after firmware upgrade

The m230 player was working fine until I upgraded the firmware from 1.0.0A to 1.3.0A.  I am now unable to drag and drop MP3 files to the player.  The only location that apears to accept files is the RECORD folder.  When dropping a file to the RECORD folder, I get the following error message.  “Cannot copy filename.mp3   The device has either stopped responding or has been disconnected.”  I have formatted the player but it has not helped.  The player screen shows no files with 492 mb total and 478 mb available.

What USB mode are you in when you try to drag and drop your music to theplayer?