First, I made a web page which only contains Facebook Comment API. (http://developers.facebook.com/docs/reference/plugins/comments/)
This works fine in any internet browser such as FF and IE. I can leave a comment - submit button works fine. Also I can change the name. (We can have multiple names/pages in one account)
Second, I made a WebBrowser in my form, and I had it navigated to the web page.

webBrowser1.Navigate(new Uri("http://mydomain.com/comment.php"));

Everything seems fine. The form displays the facebook comment properly and when I want to leave a comment, it gives me a popup up login window. Login seems working fine too as my personal photo appears. But, the submit button never works. I can't even change the name. When I click "change", it says that I havent logged in.

Anyone have any idea? I think the session of my personal authentication is never kept.

Please give me some advices!!