I tried to install 4 wordpres websites. I did 3 without problem, but 4th don't want to install. When I go to mydomain.com/wp-admin/install.php it says: Already Installed, and there is button to log in. When I press it I'm transferred to my other domain. I called my hosting provider and they said everything is done correct and there must be problem with wordpress. Can someone help and tell me what is wrong? Three other instalations was ok, this one I did exactly the same and is mistake.