Disable comments per category?

Hello,

I am using WordPress with Comicpress to start a new webcomic site. I have it set up to have comics and blog posts separated, each under their own categories. I would like to allow comments on blog entries, but not comics.

Is there a way to do this? Whether to exclude or allow a category, I could make it work either way.

I tried this but unless I didn’t put it in the right place it’s not working (though it appeared to until I posted a new “comic”)…

Thanks!