Site gone wrong [HELP]

[Zammyslave]

Hey.

I had a blog with one post. Tried installing a forum for that blog, succeeded at installing the forum, failed at maintaining the blog.

The blog had just one post lol but now it doesn't work. Nor do the categories I had created.

Btw, I know categories aren't visible until you post something on them but I proved the one that's visible and it doesn't work. Also the post does appear but it shows an error when you click on it.

Site (blog): http://relativism.site11.com
Site (forum): http://relativism.site11.com/forum

Thanks in advanced.