Domain Name Redirect broke Wordpress URL

I have a wordpress set up on my account and I wanted to have a second domain name which would point to one of the wordpress blogs. I purchased a domain through InMotion and used the AddOn Domains tool in cpanel to add it and redirect it to the URL for the blog.
I want www.yachtingscryer.com to redirect to www.projectsdonewright.com/wp/yachtingscryer

Except after doing this the blog no longer shows. It gives a blank index directory page instead.

Additionally, I tried adding a subdomain furmentation.projectsdonewright.com to redirect to www.projectsdonewright.com/wp/furmentation and the same problem now exists there. The blog's main url now only gives a blank index directory. Even after deleting the subdomain it does not go back to the way it was before.

Ideally, both options should be leading to a page similar to www.projectsdonewright.com/wp/visconte.

When I go into my wordpress admin and change the domain for the furmentation blog to www.projectsdonewright.com/wp/furmentationcomic the page loads correctly with the new url, but when I change it back to the original url it gives the new error again.

It kind of looks like the new domains broke the Wordpress URLs, but I can't figure out how to get them to play nice, or even undo what was done.

Help? Please?