Index Problem

I don't really know where this post should go, so if it is in the wrong section please move it.

I just made a new games website, in my sig, and installed a free script and lots of games. But when I go to the admin panel on the site I get a long list of files, which is completly different to what it was when I first set up the site.
Below is the screenshot of the page that I get when logging into the admin panel on the site

Does anyone here know what the problem is and how to fix it?
Is it a simple problem to solve?

I would be very grateful for any help, thanks

 

I'd suggest re-uploading the site some files may have been left out.

 

Thanks for your suggestion, but I have had the site up for three days now and have logged into the admin panel on the site fine up until today.

 

Have you modified any files recently, like htaccess or one of the configuration files?

 

I did modify one but it was a very simple change to a file. I just changed the colour of some text. I think it was in the Index.php file. Could this be the problem?

 

OK problem now solved
There was a file called Index.php, which I edited and changed the name to index-2.php.
Anyway I just had to change the name of Index-2.php back to Index.php and it is all back to normal again
Thanks for the help anyway NoobieDoobieDo