Facebook.showDialog() never return and response

I tried call

facebook.showDialog(“apprequests”, {message = “Play with me”})
It pops up a dialog for me to choose my friends. After click send, the invitation is sent and can be viewed at recipient’s phone, but nothing in the event.response. (event.type, event.name, event.isError are returned properly, but not event.response)

I need event.response to figure out how many friends did the user send app request.
From adb logcat, I saw facebook-webView(9655): Redirect URL :fbconnect://success?request=400930349962852&to%5B0%5D=783936208&to%5B1%5D=100000601266847

I can clearly see 2 ‘to’ in there, which is the number of friend I send the app request, but I am unable to retrieve that from Corona. And also the request id is also unable to retrieve.
This is the snippet:
[lua]local function listener( event )
if ( “session” == event.type ) then

if ( “login” == event.phase ) then
facebook.showDialog( “apprequests”, {
message = “You should download this game!”
})
end
elseif ( “dialog” == event.type ) then
print(event.type) --return dialog
print(event.isError) --return false
print( event.response ) --return “”/nil
end
end

– first argument is the app id that you get from Facebook
facebook.login( “1234567890”, listener )[/lua]

Any tricks? Bugs? [import]uid: 143031 topic_id: 30843 reply_id: 330843[/import]