bp-chat or ajax-chat

Is anyone using this plugin?

Perhaps I didn't use the correct information in the config file. I basically copied the user, database, and password from the wp-config.php file. I'm getting this error:

Warning: mysql_connect() [function.mysql-connect]: Access denied for user 'tkdunion_autowpz'@'' (using password: YES) in /home/tkdunion/public_html/wp-content/plugins/bp-chat/chat/lib/class/CustomAJAXChat.php on line 162

About all I can think is the last parameter is:
$this->bp_config['db'] = ""; //This is your database IP address, or domain name
I put in my domain ( tkdunion.org ) perhaps it should be http://tkdunion.org? Or, does it need to be the actual IP address? Could it be "localhost"?