Facebook连接”；出现错误.请稍后再试&”；

我的页面上有一个链接，当我点击链接并转到facebook时，链接的href由这个$facebook->getLoginUrl();设置。我得到了这个错误：An error occurred. Please try again later.:|？有什么帮助吗？谢谢

<?php
class iM_Action_Helper_FbData extends Zend_Controller_Action_Helper_Abstract
{
    public function direct(array $params = array())
    {
        return true;
    }
    /*
    * Connecting to facebook
    * It connects to facebook, this is used when you need to log a user out,
    * or if you want to get some data about a user which uses facebook
    * @return OBJ
    */
    public function fbConnect()
    {
        $getFB = Zend_Registry::get('FB');
            $facebook = new Facebook(array(
                'appId'  => $getFB->FB->APPID,
                'secret' => $getFB->FB->SECRET,
                'cookie' => true
            ));
            return $facebook;
    }
    /*
    *   Checks to see if a user is loggedin
    *   @param string  $redirect
    */
    public function checkIfLogged($redirect = "/")
    {
      $fbLogin = new Zend_Session_Namespace('fbLogin'); #Get Facebook Session
      if(!$fbLogin->user) $this->getActionController()->getHelper('redirector')->gotoUrl($redirect); #Logout the user
    }
    public function fbLoginUrl()
    {
        $facebook = $this->fbConnect();
        return $facebook->getLoginUrl();
    }
}

我在我的操作控制器中所做的是，我将这个$this->getHelper('FbData')->fbLoginUrl();传递给视图，它会返回facebook登录url，所以当用户点击链接时，它会将其重定向到facebook，然后我想被重定向回我的页面，这样我就可以让用户登录，我的整个概念错了吗？