FacebookRestClientException: A session key is required for calling this method in

Question

I have a app, that is used in the fanpage, so basically I am showing up the user request/invite form, after submission which refers to my server and I get friends ids(from $_POST) and info about user who sent invite,

to get user info I am using

 $user = $this->_facebook->api_client->users_getLoggedInUser();
 $dataToRetrive = array(....);
 $usersInfo = $this->_facebook->api_client->users_getInfo($user,$dataToRetrive);

and then I redirect to fan page again in FF it is working fine but OPera and Chrome it is loosing the session.