error when publishing

[pw <pw@riseup.net>]

Hi,

With org-mode 8.0.7 (emacs 23.4.1), I have some problems to publish a 
project.

I have this error : "Publishing file /home/xxx/site/org/index.org using 
`org-publish-org-to-html'
find-buffer-visiting: Wrong type argument: stringp, (:base-directory 
"~/site/org/" :base-extension "org" :publishing-directory 
"~/site/public_html/" :recursive t :publishing-function 
org-publish-org-to-html ...)"

I also had once this error : "org-publish-file: Symbol's function 
definition is void: org-publish-org-to-html"

I have this code into my .emacs :
-----------------------------
;; org-mode publishing
(require 'org-publish)
(setq org-publish-project-alist
       '(("org-notes"
      :base-directory "~/site/org/"
      :base-extension "org"
      :publishing-directory "~/site/public_html/"
      :recursive t
      :publishing-function org-publish-org-to-html
      :section-numbers nil
      :table-of-contents nil
      :export-creator-info nil
      :export-author-info nil
      :auto-preamble t
      )
     ("org-static"
      :base-directory "~/site/org/"
      :base-extension "css\\|js\\|png\\|jpg\\|pdf\\|mp3\\|ogg"
      :publishing-directory "~/site/public_html/"
      :recursive t
      :publishing-function org-publish-attachment
      )
     ("site" :components ("org-notes" "org-static"))))
-------------------------------

Any ideas ?

pw