[ubuntu] audio files copied to player won't appear on player

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http://ubuntuforums.org – When I copy files to a creative zen player the files are not there when using the standard copy and past to the player method. Or simply drag to the player. I mean you can see the files copied and they are there from the desktop view. However, when you disconnect and open the player the files are not there. But if I use gMTP to copy them over to the player they work fine and you can see the files from the player. Is there something different about the way the gMTP copies the files to the zen player that is different then simply using the copy and paste method or simply drag to the play (Hardware)