facebook plugin error "The page at http://myLongURLhere/ could not be reached.

when I did the set up it gave me the ok but when I did a quick test by clicking to "like" one of my own posts it gave me this error message:

"The page at http://modernbroker.com/fannie-mae-accepts-electronically-signed-contracts-finally/ could not be reached."

I'm hoping I just missed something simple in the set up of the plug in? Any help is appreciated.

thanks,
Preston