Why does :q kill my emacs?

I've been using viper up to now and would like to use the visual and inner word extensions provided by vimpulse. So I downloaded http://www.emacswiki.org/emacs/vimpulse.el, installed it in my lisp directory, and required it iso viper. However, I am frustrated by the fact that now :q or :wq completely kill emacs rather than the current buffer. This is not the case when I stick to viper. I have no idea how to figure this out, lease advise, Guivho.