Wordpress can't connect to mysql?

[mogey5101]

I recently upgraded to Mysql 5.5 and PHP 5.4, however I also reinstalled mysql and cleared out my database, I did import the database for the forums and WP from an sql file. http://mrkdgaming.com/site/ - the wordpress site gives this error "Error establishing a database connection".

The forums can connect fine though, http://mrkdgaming.com/forum/

Even a small test script can connect fine, http://mrkdgaming.com/test.php. I do have username, and database information entered correctly. Any help?

One other thing to note, MySQLi and MySQL extensions are both enabled in the PHP.ini