Not displaying with Theme Pagelines DMS

Hi there

I’m trying to get Comment Plus work on my blog, which has Pagelines DMS as Theme. But it won’t show, it remains the default comment form.

I saw the part with the hooks, but I’m also kinda newbie in these things.

What do I have to do to get comment plus work on my website?

Thank you already for your help and feedbacks.

Greetz

Elìa