Install CI on Brinkster

[eluser]justmelat[/eluser]
I was hoping to find someone who user Brinkster who could give me specifics.

Go here. http://www.mywebgenius.net/ci/

this is my default controller page


i have changed the config files various times, these are my current settings.
$config['base_url'] = "http://www.mywebgenius.net/ci/";
$config['index_page'] = "index.php?";
$config['uri_protocol'] = "PATH_INFO";
$route['default_controller'] = 'purestaff';

if i removed the ? in the index_page and set the uri_protocol to auto i get the following error
CGI Error
The specified CGI application misbehaved by not returning a complete set of HTTP headers.