Joomla DB - Acces Denied for Drupal id1 user

I have issue with Joomla during conversion to Drupal. It seems that Data Base is protected and requests user id. If it is appropiate it should gave pass. But it's not doing this.

I've given appropiate PRIVILEGES for Drupal user in CPanel, so this (I) user should be able to query Joomla's database. It doesn't happen.

user warning: SELECT command denied to user 'username_drupal5'@'localhost' for table 'jos_users' query: SELECT * FROM _joomladb.jos_users ORDER BY id in /home/username/public_html/drupal5/includes/database.mysql.inc on line 174.