ess smart assing key no longer works

I have this in my .emacs file. It used to work fine but no longer works. Pressing ";" just inserts ";".

(require 'ess-site)
(require 'ess-rutils)
....
;; smart assign
(setq ess-smart-S-assign-key ";") ;if ";" needed, press ";" key twice
(ess-toggle-S-assign nil)
(ess-toggle-underscore nil) ;leave underscore key alone!

Thanks.

[vspinu]

I think all you need to do now is to leave the first line. But it must be set before ESS has been loaded.

@jabranham In principle we could check for ess-smart-S-assign key every time ess-mode is loaded and assign it in the local map instead of doing it on ess startup. This way users could re-assign it in the middle of the session.

[lionel-]

Good idea, let's do that. Issues of configuration timing can be so confusing.

OK, that worked. I've kept only the following line and put it before the require statements.
(setq ess-smart-S-assign-key ";") ;if ";" needed, press ";" key twice

Thanks.