Fail message

The allow_url_fopen directive is turned on but I’m still receiving the following error messages. Can you tell me what these errors are and how to fix them. Thanks so much.

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Warning: simplexml_load_file(http://api.openweathermap.org/data/2.5/forecast?q=Key%20West%2C%20FL%2C&mode=xml&units=imperial&APPID=46c433f6ba7dd4d29d5718dac3d7f035&lang=en) [function.simplexml-load-file]: failed to open stream: HTTP request failed! HTTP/1.1 512 in /home/missions/public_html/marina/wp-content/plugins/wp-cloudy/wpcloudy.php on line 1592

Warning: simplexml_load_file() [function.simplexml-load-file]: I/O warning : failed to load external entity

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Website: http://marina.gnucreations.com

http://wordpress.org/plugins/wp-cloudy/