If you visit

designussion.com you will see a twitter feed just above the navigation

im getting this error and have no idea how to fix it.....

Warning: file_get_contents(http://search.twitter.com/search.atom?q=from:designussion&rpp=1) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.0 503 Service Unavailable in /home/onempsic/public_html/designussion/wp-content/themes/designussion/header.php on line 77
anyone able to explain and help me out?
Thank you