error msg

Error detected while loading xmonad configuration file: /home/lswest/.xmonad/xmonad.hs

xmonad.hs:110:5:
    No instances for (LayoutClass l0 Window, Read (l0 Window))
      arising from a use of `xmonad'
    Possible fix:
      add instance declarations for
      (LayoutClass l0 Window, Read (l0 Window))
    In the first argument of `(=<<)', namely `xmonad'
    In the expression: xmonad =<< toggleStrutsKey conf
    In the expression:
      do { din <- spawnPipe statusBarCmd;
           spawn secondBarCmd;
             xmonad =<< toggleStrutsKey conf }

xmonad.hs:110:16:
    Couldn't match expected type `IO (XConfig l0)'
                with actual type `(KeyMask, KeySym)'
    In the return type of a call of `toggleStrutsKey'
    In the second argument of `(=<<)', namely `toggleStrutsKey conf'
    In the expression: xmonad =<< toggleStrutsKey conf