Can't Access Installation Wizard

I am not able to access the installation wizard. I have copied the SuiteCRM files onto my server and changed the permissions. But when I follow this step (http:////install.php) I cannot access the installation wizard that it says will pop up. I keep getting a message that says my browser cannot open the page.

What is supposed to go in place of ? I have tried my IP address and also my domain name I am putting the name of the directory in where it says , so I’ve replaced that with the directory name “SuiteCRM-7.11.6” as it is in my file structure. What am I doing wrong at this step where I cannot get to the installation wizard?

To clarify, when I use the IP address I get a 404 not found error.