Smart URLs on Addon Domain

I host my personal site on a server. I set up an addon domain on that server for an organization I’m working with, and set up the “smart urls” for it. Now however, when I hit the site (http://www.cvns.org), I get the proper site, but when I click on a page or a post, it shows the full address to the page on the server (ie. http://www.whatadewitt.com/cvns/about).

I’d like it to just show up as http://www.cvns.org/about
Any ideas how I can do this?

Thanks,

–d