Auto Reply Function

I am using 2.7 wordpress and streamline theme, but i tried to use the plugin WP-thread-comments to send a notify email to replier, but it seems doesn’t work, always send the email just to “admin author email” but not to the replier email account, but it works at the theme ” WordPress default”, can anyone help me to solve this problem ?

My blog link is https://www.princeno2.com