Creating a custom child theme

Heya, having trouble with a custom child theme.

Have a child theme called template_basic_MQ8, with style.css with the following code:

/*
Theme Name: MQ8
Theme URI: http: //www.myq8home.co.uk
Description: This is a child theme for the PremiumPress responsive framework.
Author: M.D.W
Author URI: http: //www.myq8home.co.uk
Template: RT47
Version: 1.0
*/

/* =Theme customization starts here
-------------------------------------------------------------- */

and functions.php:

<?php
// TELL THE CORE THIS IS A CHILD THEME
define('WLT_CHILDTHEME',true);

?>

That installed and activated just fine, but the back-end layout is all off – as if it’s not grabbing the css 🙁

I’d appreciate a tip.
Everything works fine with one of your child themes so I’m obviously doing something wrong, just not sure what :p
Cheers.