Tashahost

Hi guys how are you and after upload of the WHMCS files on my file manager in Cpanel as im installing this on my subdomain and after renaming the configuration file to configuration.php when i enter the link of the website www.my.domainname.com/install/install.php it keeps adding /install/ and not taking me to the setup like this http://www.domain.com/whmcs/install/install/install/install/install.php each time it says Click here to begin