Mp3 Player Directory not recognized

I was trying to fix the tags on my Mp3 player (Sony Walkman) but when I click on 'change directory' or 'add directory' it won't show my Walkman directory. Help?

Does your walkman directory show up in the explorer?
If so, copy the path from the address field in the explorer and enter it in the directory field in MP3tag and press enter.
if it does not ... I know too little about a walkman to give sound advice on that hardware.