[Plugin: Facebook] Emergency

I was having problems with some little html that was showing up with the social publisher posting on my Facebook page. I came to this forum and found a post that said to replace the social publisher php with one they provided. I did and now my site doesn’t work anymore. When I try to log in to my admin panel it tells me I don’t have privileges anymore. When I go to my site I get a Parse error: syntax error, unexpected yada yada yada message. I saved the original php and tried to replace it and got that message. I couldn’t do anything on the dashboard and now I’m completely logged out. When I try to login it tells me I don’t have admin privileges and I am the admin. There is no number to call at WordPress. I have no clue as to how to get back in my site.

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