upgrade from 2.2.5 to 2.2.8

[Barrowboy]

Hi
I am having an issue running the 2.2.8 installer.
I have followed the instructions and the file www.mysite.co.uk/cmsms-2.2.8-install.php

But when I try to run it in the browser it states 'This page isn’t working'

and changes the URL to www.mysite.co.uk/cmsms-2.2.8-install.php/index.php
I cannot stop it adding the extra /index.php

I have tried unzipping the file in a new folder not the root but I get the same result when trying to run.

Your advice please.

[Barrowboy]

I have now upgraded using the expanded package which seems to work ok.

Thanks