When I paste that feed in the browser it shows invalid request.
Did you move the blog from one page to another? Doing that will break it. The url for the feed is a friendly url that maps to http://www.lasvegasdistrict.com/Blog/RSS.aspx?pageid=x&mid=y
If the page id or module id is not correct or if the feed is disabled from the blog settings or if the page containing the blog is protected by roles it will give the invalid request message.
If you moved the blog to a different page after making posts then I would also expect the blog item urls to be broken.
The only way to fix them is to find the urls under Administration > Advanced Tools > Url Manager and correct the real url part to have the correct page id.
Hope it helps,
Joe