[emms-help] Number oarguments problem with player

[A . W .]

Here's the code I used:
;;Yazawa Tetris
(require 'emms-player-simple)

     (define-emms-simple-player yazawa
                                '(file)
                                "\\EY*.mp3$"
                                "play"
                                "--volume=100"
)


(add-hook 'tetris-mode-hook 'emms-player-yazawa-start)

AAAAAND the error it throws:
Debugger entered--Lisp error: (wrong-number-of-arguments (lambda
(track) "Start the player process." (emms-player-simple-start
(emms-track-name track) emms-player-yazawa
emms-player-yazawa-command-name emms-player-yazawa-parameters)) 0)
  emms-player-yazawa-start()
  run-hooks(tetris-mode-hook)
  apply(run-hooks tetris-mode-hook)
  run-mode-hooks(tetris-mode-hook)
  tetris-mode()
  tetris()
  call-interactively(tetris t nil)
  execute-extended-command(nil)
  call-interactively(execute-extended-command nil nil)