404 Error page

I installed the plugin and entered a property to start customizing and testing the setup for our new site. When I entered the first property, it shows on the list page, but when you click on the property it gives a 404 error. I cannot find any problems with how I installed the plugin, or entered the property, but it still won’t show on the single listing page.

Listing: http://collarcity.biddercentral.com/listings/
Single listing: http://collarcity.biddercentral.com/listings/8315-western-tpke-delanson-ny/

Am I missing something??