Newbie major-mode and elisp question

[sj <dummy@dummy.com>]

I'm writing my first major mode to run Nyquist in a buffer. Nyquist is an
extension of XLISP for audio synthesis and composition.  Nyquist-mode is a
derivative of inferior-lisp mode, its working pretty well except for one
annoying side effect. Whenever I issue (nyquist-mode) to start a new
Nyquist process, whatever buffer I'm currently in gets switched to
fundamental-mode. I have isolated the problem to the
kill-all-local-variables statement.  Is there some other way I should be
doing this?   



(defun nyquist-mode ()
  (interactive)
  (if (nyquist-has-process-p)
      ;; If we are already live just switch to the nyquist buffer
      (switch-to-buffer nyquist-buffer)
    ;; Else start a new Nyquist process.
    (progn 
      ;; Clean up any old nyquist process buffers
      (if (get-buffer nyquist-buffer)
   (kill-buffer nyquist-buffer))
      (kill-all-local-variables)
      (run-lisp nyquist-program)
      (switch-to-buffer "*inferior-lisp*")
      (rename-buffer nyquist-buffer)
      (setq major-mode 'nyquist-mode)
      (setq mode-name "Nyquist")
      (setq inferior-lisp-buffer nyquist-buffer)
      (lisp-load-file nyquist-start-file)
      (use-local-map nyquist-map)
      (run-hooks 'nyquist-hook)
      )))
    
Some background: 

There is only --one-- nyquist process at any time.  The variable
nyquist-buffer holds the buffer name for the nyquist process (needed
because I ultimately need other non-nyquist lisp running)

nyquist-program contains the local invocation to run nyquist.  Hopefully the
rest is self-explanatory. 


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