mysql_select_db returned access denied error...

Hi! When I use the mysql_connect(), it was connected successfully. The next step I need to do is to use a database via mysql_select_db(). Problem is I get the access denied error from MySQL. It sure look like privileges is not setted up right. Am I right? If so then which column in the 'user' table in the 'mysql' database is the one that take care of the "USE DATABASE db_name" privileges.. Thanks, FletchSOD