my first wp plugin, create table doesn't work

Hi,

I’m creating my first WordPress plugin and I’m already hitting a problem. I need to create a table when activating my plugin, but it doesn’t work. here’s my code:

<?php
/*
 * Plugin Name: plugin name
 * Description: bla bla bla
 * Version: 1.0
 * Author: Author
 */

register_activation_hook(__FILE__, 'flashplayer_install');

function flashplayer_install(){

    global $wpdb;

    $tbl_name = $wpdb->prefix.'flashplayer';

    if( $wpdb->get_var("show tables like '$tbl_name'") != $tbl_name ){

        $sql = "CREATE TABLE ".$tbl_name." (
                    id INT(10) NOT NULL AUTO INCREMENT,
                    title TINYTEXT NOT NULL,
                    filename VARCHAR(100) NOT NULL,
                    UNIQUE KEY id(id)
                );";
        require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
        dbDelta($sql);

    }

}

?>

What Am I doing wrong here?