Problem using org-sbe

[Bachir El Khadir <bachir009@gmail.com>]

 Hello all,
 I am new to org-mode.  I have just installed the latest version using el-get, but I am having a very annoying problem.
 The command org-sbe doesn't seem to work.
 Here is a minimal example that I took from the doc:

#+begin_src emacs-lisp :results silent
   (defun fibbd (n) (if (< n 2) 1 (+ (fibbd (- n 1)) (fibbd (- n 2)))))
 #+end_src

 #+name: fibbd
 #+begin_src emacs-lisp :var n=2 :results silent
 (fibbd n)
 #+end_src

 | original | fibbd  |
 |----------+--------|
 |        0 | #ERROR |
 |        1 | #ERROR |
 |        2 | #ERROR |
 |        3 | #ERROR |
 |        4 | #ERROR |
 |        5 | #ERROR |
 |        6 | #ERROR |
 |        7 | #ERROR |
 |        8 | #ERROR |
 |        9 | #ERROR |
 #+TBLFM: $2='(org-sbe "fibbd" (n $1))

 As you can see I keep getting #ERROR  
 Am i doing something wrong?
 Thanks a lot