Moving CI website to another server - only blank page showing

I found a possible solution for this error:
https://stackoverflow.com/questions/2834...odeigniter
So I modified the Common.php to this:

Code:

$_config[0] =& $config;
return $_config[0];

But... nothing happened. :/ In Firefox, only a blank page showing, and in Chromium, I got a HTTP error 500.