404 error

Hello! I have istall one word press 3.1 succesfully, but now when i try to do another one, i upload the wordpress, i make the data base i open wp-config sample, i modify it with my data base info, save it like wp-config.php, uploades and when i go to try it in https://www.ibizahippymarketonline.com/vivien it appears
Not Found

The requested URL /vivien/ was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request…
could somebody help me with this…??please!
thanks!