You cannot access the installation procedure because the file "lock.bin" exists inside the "includes" directory!

The "lock.bin" file is created automatically during the installation and it is used to mark this script as "installed". When this file is created, this installation script is disabled in order to prevent unathorized access. If you are the owner of this script, and you want to install/reinstall this script, please delete the "lock.bin" file which is located inside the "includes" directory.