Can't get past login

I've seen this problem on here a few times but can't seem to get anything to work. When I try to login it just clears the form and refreshes the page. Hosting it on mediatemple, and I setup the mod rewrite in my htaccess file. Here are my settings:

/*  Set the URL to your Sendy installation (without the trailing slash) */
define('APP_PATH', 'http://trustthebum.com/sendy');

/*  MySQL database connection credentials  */
$dbHost = '64.207.157.52'; //MySQL Hostname
$dbUser = 'username; //MySQL Username
$dbPass = 'pword'; //MySQL Password
$dbName = 'dbname'; //MySQL Database Name