facebook invitation request error

We use facebook connect and invite friends dialog for our company website. I can be able to send invitations to my facebook friends but when they click on the the invitation request on their notification list an error occured: "Sorry, the application you were using is misconfigured. Please try again later.".

Here is the javascript function which show the invite friends dialog and send invitations. I need to solve this problem quickly. Do i missing something? Thanks a lot!

function internalInviteFacebookFriends(opt_params) {
FB.init({
    appId : opt_params.facebookAppKey,
    cookie : true,
    status : true,
    xfbml : true
});
FB.ui({
    method : 'apprequests',
    filters : [ 'app_non_users' ],
    message : 'Invite your friends to netmera platform'
}, function(response) {
    if (response && response.request_ids) {
    }
    // TODO registerdan gelince autologin yap
    if (opt_params.login == "true") {
        var params = {};
        params.facebookID = opt_params.facebookID;

internalLogin(params, null);
    }
});

}