Unable to Create Database Tables

Hi,

I am trying to make a plugin but am having some trouble, I cant see anything wrong with the below code but it doesnt seem to be working..

if(!defined('VURL_DBNAME'))
	define('VURL_DBNAME', 'vurls');

function vurl_plugin_options_install() {
   	global $wpdb;
  	$table_name = $wpdb->prefix . VURL_DBNAME;

	// create the ECPT metabox database table
	if($wpdb->get_var("show tables like '$table_name'") != $table_name){
		$sql = "CREATE TABLE IF NOT EXISTS <code>$table_name</code> (
				  <code>id</code> int(11) NOT NULL AUTO_INCREMENT,
				  <code>vurl</code> varchar(255) NOT NULL,
				  <code>desturl</code> varchar(255) NOT NULL,
				  <code>type</code> varchar(10) NOT NULL,
				  PRIMARY KEY (<code>id</code>)
				);";

		require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
		dbDelta($sql);
	}

}
register_activation_hook(__FILE__, 'vurl_plugin_options_install');

function vurl_pluginUninstall() {
	global $wpdb;
	$table_name = $wpdb->prefix . VURL_DBNAME;
	$wpdb->query("DROP TABLE IF EXISTS $table_name");
}
register_uninstall_hook(__FILE__, 'vurl_pluginUninstall' );

Thanks for taking a look for me ??
Daniel