Database creation problem


I have finally decided to expand my wpmu site. After setting up all the multi-db files, when I try to create multiple databases via PHP MyAdmin for 256 configuration I get the following error

#1044 – Access denied for user ‘wor-3’@’%’ to database ‘wpmu_0’

Further hosting provider says that you can only create database one by one through hosting control panel.. I don’t even have cPanel..

any ideas, how should I create 256 databases.. ?