Can't use fcitx

[C-Entropy]

I wrote something like this

(define-widget main-window (QWidget) ())
(define-subwidget (main-window writing-desk) (q+:make-qtextedit main-window))
(defun start ()
 (with-main-window (window 'main-window)))

then in the text edit I got, I can't input Chinese using fcitx-rime.What should I do to enable fcitx? I'm using SBCL V2.0.7, qtools is installed by quicklisp, so it should be the latest version too. Fcitx can be used in program like firefox.