Searching Posts results in error messages

After searching for a word in conversations I receive:

Warning: simplexml_load_file() [function.simplexml-load-file]: http://64.69.47.100:8080/search/searchService?lang=zh_CN&p=&keyword=posting:1: parser error : Document is empty in /var/www/vhosts/chinesepod.com/releases/20081127080548/application/modules/community/controllers/ConversationsearchController.php on line 24

Warning: simplexml_load_file() [function.simplexml-load-file]: in /var/www/vhosts/chinesepod.com/releases/20081127080548/application/modules/community/controllers/ConversationsearchController.php on line 24

Warning: simplexml_load_file() [function.simplexml-load-file]: ^ in /var/www/vhosts/chinesepod.com/releases/20081127080548/application/modules/community/controllers/ConversationsearchController.php on line 24

Warning: simplexml_load_file() [function.simplexml-load-file]: http://64.69.47.100:8080/search/searchService?lang=zh_CN&p=&keyword=posting:1: parser error : Start tag expected, '<' not found in /var/www/vhosts/chinesepod.com/releases/20081127080548/application/modules/community/controllers/ConversationsearchController.php on line 24

Warning: simplexml_load_file() [function.simplexml-load-file]: in /var/www/vhosts/chinesepod.com/releases/20081127080548/application/modules/community/controllers/ConversationsearchController.php on line 24

Warning: simplexml_load_file() [function.simplexml-load-file]: ^ in /var/www/vhosts/chinesepod.com/releases/20081127080548/application/modules/community/controllers/ConversationsearchController.php on line 24