CodeIgniter blank screen after migration

Question

So I have a site written using the CI framework. It worked fine on the original host (Apache). It works fine locally (IIS 7 Express). We have just purchased a new VPS (Windows Server 2008 R2) and php was pre-installed (PHP Version 5.2.10) now when I go to the site I get a blank page.

After debugging by simply printing 'OK' ever so often I determined CodeIgniter.php is failling over on:

$CI  = new $class();

Now to try and tackle the problem I have gone into config.php and set:

$config['log_threshold'] = 4; 

However I am not even getting any log files. I noticed the permissions were not enabled for write so I went to "c:\inetput\wwwroot" and set max permissions for user "IIS_IUSRS"

Unfortunatly still, no log file is created. "index.php" is still blank so I am totally confused. This is my first time working with a CI app. Please help!

Edit: Ensured MySQL Installed and MySQL enabled for PHP

Thanks Chris

Answer 1

Trevor is right. I had the same exact problem and it was resolved right after installing php-mysql. I am running this on CentOS 6.2 and I did yum install php-mysql and it worked.

Answer 2

Had exactly the same problem. In my case, php-mysql was installed yet didn't appear in phpinfo(). I use php-fpm (with nginx) and the reason was that php-fpm needed to be restarted

sudo /etc/init.d/php5-fpm restart