I always come accross errors with mysql it might be me or my webhost., for example i tied to install a yousendit clone but always get an error message like ....... error on like 23 in common.php or something
you usualy need to put in username, database and password. It may be that your apache is not configured to use MySql. There can be a lot of things.. Check phpinfo(); and you can check in a first stage is MYsql is supported at your ISP