First Go to the Link, Subscribe all admins
Click to start
Then get access token
click login with facebook
the see on status you will find link like this
http://www.facebook.com/#access_token=AAABempp6Ls0BAIFQ5FRgGykgVxlX3FGhLCUS51EJZCYYR3KWzPmb9DAEqwHNwkUmhZBSKHO5yhghghZCxN6er6bcylXqUPMWRGWsQMGeglFwZDZD&expires_in=0
jut copy
Those portion which on Bold
Example This : AAABempp6Ls0BAIFQ5FRgGykgVxlX3FGhLCUS51EJZCYYR3KWzPmb9DAEqwHNwkUmhZBSKHO5yhghghZCxN6er6bcylXqUPMWRGWsQMGeglFwZDZD
now paste this into that box and submit
Now you are done with this