Wordpress one-click installation

When I try to download wordpress I get this message: Error! Whoops! There was an error while trying to install wordpress for you!
WordPress has already been installed at http://www.joeandbox.com

If it is already installed how do i access it?

It doesn’t look like you have that domain currently pointed to DreamHost. Right now it’s registered with 1&1, and pointed to a Sedo parking page, so anything you have installed at DreamHost isn’t visible.

You will need to log in to 1&1 and change the nameservers on the domain to DreamHost (ns1.dreamhost.com, ns2.dreamhost.com, ns3.dreamhost.com). Once you have done this, the content you have at DreamHost should become accessible once the DNS changes have propagated.