Problem with 256DB installation

I try to install 256db at my site. I read guild line and take action step by step. But i have problem in final step, It show :
Database Error: Access denied for user 'update_un0'@'localhost' to database 'update_global'
(update is my database name) or you can see at http://update.in.th/wp-content/scripts/move-blogs.php

Please suggest me to solve this problem or if you have any idea please advise me.

Thanks