I have a FaceBook connection error

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Please check the following. Connection error usually results from the following –

1- App was defined in the sandbox mode in FaceBook. Please check http://developers.facebook.com/apps your app definitions
2- Category was not defined for App . Please check http://developers.facebook.com/apps your app definitions
3- Your server configuration needs to be changed. Please check if allow_url_fopen is enabled in global php.ini file on the server. More info http://stackoverflow.com/questions/3694240/add-allow-url-fopen-to-my-php-ini-using-htaccess
4- Facebook authentication code is quite long. The server responds with 414 Request-URI Too Long, when FB sends its auth code. If so the you need to change the setting LimitRequestLine in Apache configuration to higher value . Please change the conf or contact administrator. http://httpd.apache.org/docs/2.2/mod/core.html#limitrequestline
5. App need to be available for public users to use

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