Trying to download a book from Openlibrary.org and when ADE opens I get this error: "E_ADEPT_NO_FULFILLMENT_RESULT". Any ideas?

When using ADE to download Epub or PDF books the above error is received.  The download link is: URLLink.acsm.  However, ADE opens and then above a brief pause this error is received.  Any ideas?  I've added ADE to my firewall exceptions list.