Possible Duplicate:
Why do we need to create a channel.html on our server to use Facebook JS SDK?
following this guide I was able to enter the login of facebook in one of my php page
http://developers.facebook.com/docs/guides/web/
But I do not understand how to change this line. what is it?
channelUrl : '//WWW.YOUR_DOMAIN.COM/channel.html', // Channel File
You need to read out this: How-To: Optimize Social Plugin Performance