how to add a range of columns

[Uwe Brauer]

Hi 

I'd like to add a range values of two columns something like this 

#+begin_src elisp

#+Name: check
| User1 | User2 | Result |
|-------+-------+--------|
|     1 |     3 | [4]    |
|     4 |     8 | [4]    |
|     9 |     3 | [4]    |
|-------+-------+--------|
|     7 |     9 | [4]    |
#+TBLFM: @I$3..@II$3=@I$1..@2$1+@I$2..@II$2
#+end_src


But it does not work, so I am a bit puzzled. Any advice would be
welcome.

Uwe Brauer