http:// wrapper is disabled in the server

WP in Settings of the Plug-in show me this 3 messages:

Warning: DOMDocument::load() [domdocument.load]: http:// wrapper is disabled in the server configuration by allow_url_fopen=0 in /data/26/2/102/75/2754564/user/3028044/htdocs/wp-content/plugins/facebook-comments-plugin/class-admin.php on line 194

Warning: DOMDocument::load(http://www.facebook.com/translations/FacebookLocales.xml) [domdocument.load]: failed to open stream: no suitable wrapper could be found in /data/26/2/102/75/2754564/user/3028044/htdocs/wp-content/plugins/facebook-comments-plugin/class-admin.php on line 194

Warning: DOMDocument::load() [domdocument.load]: I/O warning : failed to load external entity “http://www.facebook.com/translations/FacebookLocales.xml” in /data/26/2/102/75/2754564/user/3028044/htdocs/wp-content/plugins/facebook-comments-plugin/class-admin.php on line 194

http://ww.wp.xz.cn/plugins/facebook-comments-plugin/