display Theo-NotificationWindow in Battle?

[BlueMage]

Hi guys, i tried to modify Theo's script here:
https://github.com/theoallen/RGSS3/blob/master/Notification Window (ENG).rb
to display Notification Window (NW) in Battle too.
I added these code at the end of script, but NW will display only once in the Battle.
It won't be displayed again after that =O what's going on..?
Can someone help me?

class Scene_Battle < Scene_Base
alias theo_typenotif_start start
def start
theo_typenotif_start
@notif_text = Window_TypingNotif.new
end
end