Ahh i spoke to soon! When i activated the parent theme it had just changed the header to one which had the logo on already, but i need the logo to hyperlink to the home page.
I just tried this code still no luck
/* CSS Document */
Theme Name: bp-default
Theme URI: http://example.org/themes/dusk/
Description: Dark theme for BuddyPress.
Author: John Doe
Author URI: http://example.org/
Tags: blue, buddypress, custom-background, custom-header, custom-menu, editor-style, featured-image-header, featured-images, fixed-width, light, right-sidebar, rtl-language-support, sticky-post, threaded-comments, translation-ready, two-columns, white
@import url ("www.releasethereal.com/public_html/wp-content/plugins/buddypress/bp-themes/bp-default/style.css");
background:url(http://www.releasethereal.com/wp-content/uploads/2012/08/RTR-logo2click.png) no-repeat 0 0;
/*<a id="logo" href="www.releasethereal.com" class="linkedImage">*/
background: url(http://www.releasethereal.com/wp-content/uploads/2012/06/Header-Workerwithout-line.png) 0 top no-repeat;