[Lynne]

You can also try turning on debug mode and seeing if a more specific error shows up.

To enable debug mode edit the /config.php file and change:

$config['debug'] = false;

To:

$config['debug'] = true;

Then edit the /core/includes/config.php file and change:

// $config['Misc']['debug'] = true;

To:

$config['Misc']['debug'] = true;

To set that up for only your IP address (replace xxx.xxx.xxx.xxx with your IP), put these lines around the code:

if($_SERVER['REMOTE_ADDR'] == "xxx.xxx.xxx.xxx") {
CODE HERE
}