MediaWiki settings

I setup MediaWiki and am trying to change some settings but they are not having any affect.

I installed it to a /wiki/ directory and then moved LocalSettings.php to that directory.

(1) I had make a mistake in the title when setting it up so I tried to set the sitename using:

$wgSitename = “NewName”;

(2) I wanted to lock out user registrations so I added this per the Dreamhost wiki instructions: below require_once( “$IP/includes/DefaultSettings.php” );

Disallow edits by unregistered users:

$wgGroupPermissions[’*’][‘edit’] = false;
$wgShowIPinHeader = false;

Disallow account creation:

$wgGroupPermissions[’*’][‘createaccount’] = false;

None of these settings are having any affect. How do I activate these changes?