wpdiscuz reply-info-mail isn’t sent, but WPs

Hello!

first of all: Thank you for that plugin! It’s really great!

This is my problem in detail:
When a comment is replied, I didn’t get the information mail about that from wpdiscuz-plugin, but from WordPress.

In another installation, that works as expected. So I think, any of the many options isn’t set correctly, but I don’t know where to look. I’ve check all options, but didn’t find anything like „use wpdiscuz Mail-System“ or „use WordPress informations“ — although I think to remember, there was an option like that, anywhere…

Hope you understand the problem…

Thanks for support!