[YouTube-API] API functions error !!!!

Warning: simplexml_load_file(http://gdata.youtube.com/feeds/api/standardfeeds/most_recent?format=5&start-index=1&max-results=10) [function.simplexml-load-file]: failed to open stream: HTTP request failed! HTTP/1.0 403 Forbidden in /home/dimsvote/public_html/apifunctions.php on line 69

Warning: simplexml_load_file() [function.simplexml-load-file]: I/O warning : failed to load external entity "http://gdata.youtube.com/feeds/api/standardfeeds/most_recent?format=5&start-index=1&max-results=10" in /home/dimsvote/public_html/apifunctions.php on line 69

Fatal error: Call to a member function children() on a non-object in /home/dimsvote/public_html/apifunctions.php on line 72 

Please Help :((

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