The Collaborative International Dictionary of English v.0.48:

Successless \Suc*cess"less\, a.
   Having no success.
   [1913 Webster]

         Successless all her soft caresses prove. --Pope.
   [1913 Webster] -- Suc*cess"less*ly, adv. --
   Suc*cess"less*ness, n.
   [1913 Webster]