Doesn't work with OneClickDigital

Trying to download audio book from local library using OneClickDigital Media Manager to Sansa Fuze 4GB.  OneClick advised to set Fuze to MTP mode which I did successfully.  However, when I try to download a book, OneClickDigital media manager says  is can’t download to Sansa Fuze, check preferences.  Anyone every heard of this.  Thanks.

Do you have Windows Media Player 10 or above in your computer? MTP may need that.

Also, try OneClickDigital help.