[Plugin: WPBook] Import Comments doesnt work

I have this problem.. the plugin works..it does post my recent posts on facebook fan page. but it doesn’t import the comments to my blog.

there seems to be a problem because when i entered all the information on the Stream / Wall options.. and I hit save..all the information dissapears..and its blank. The only section that still has the information is Required Settings.

http://wordpress.org/extend/plugins/wpbook/