I'm asking you for help, because I can't understand what I'm doing wrong. I was trying to make secondary user authentication by Facebook for my application. 

I had done everything according to this blog entry:
<http://thinkdiff.net/facebook/php-sdk-3-0-graph-api-base-facebook-connect-tutorial/>

and once verification went fine and since another time I have error: 
"An error occurred. Please try again later."

I can't even get cause of error or any message. Everything seems to be OK. But I can't get through verification. When i use FB loginUrl i redirects me to error.

This is my FB code:

```
var $fbconfig = array(
        'appId' => '1234567890',
        'secret' => '12345678901234567890',
        'baseurl' => "http://xxxx.xx",
        'fbLoginSuccess' => "http://xxxx.xx/xx/xxxx",
        'cookie' => true
     );

        $facebook = new Facebook(
                        array(
                                'appId' => $fbconfig['appId'],
                                'secret' => $fbconfig['secret'],
                                'cookie' => $fbconfig['cookie'],
                        )
                );
        $userFB = $facebook->getUser();
                if ($userFB) {
                    $logoutUrl = $facebook->getLogoutUrl();
                } else {
                    $loginUrl = $facebook->getLoginUrl(
                            array(
                                    'scope'         => 'email',
                                    'redirect_uri'  =>  $fbconfig['fbLoginSuccess']
                            )
                    );
                }

```

I had found a way to receive answer through `redirect_uri` with `err_msg` variable. And then found a solution here: <http://developers.facebook.com/bugs/112163982233944>