[racket] Difficult key-binding

Hello there.

I am trying to add this keybinding, but without success:

(keybinding "c:x;c:k" (λ (editor evt)
                        ;; close current tab (or buffer)
                        (send editor close-current-tab)))

The error I got is this:

send: no such method: close-current-tab for class:
...plt/1/6/diva-link.ss:572:4

I am, as you can see, using divascheme. But from what I can see, this
diva-link should accept the close-current-tab method.

Any pointers?

-- 
Eduardo Bellani

omnia mutantur, nihil interit.