New forum, getting error? (CPanel)

I already was running one forum, but for my work starting a second one, however I cant get it work. My host is using Cpanel and I opened MYSQL Databases and insered "ok" as database name. Server automaticly called it lalala2_ok. Did exact the same with user and entered a password.

Next I wend to forum/admin/install.php and entered:
localhost
lalala2_ok
lalala2_ok
***********
foo_

my@email
Ken
***********

Note: Both passwords (admin and sql) are the same, however the SQL password has one extra capital.

This is the error I get:

Sorry! The page could not be loaded.

Unable to select database. MySQL reported: Access denied for user 'lalala2_ok'@'localhost' to database 'lalala2_ok'

The error occurred on line 42 in /home/lalala2/public_html/forum/include/dblayer/mysql.php

So I know the error, but I dont know yet how to fix this.