Reseting drupal password with latest drupal version has become much harder task, before you could just MD5 user table and add new password, now the "salt" is added so it is a bit harder. There are two ways, with mysql and shell access, or with php file. First you can find here
https://drupal.org/node/1023428 - SSH and MySql
https://drupal.org/node/1556488 - PHP file