Today i found a strange problem when i install wordpress MU.
When i try to searching more deeper i found something usefull here.

Here is a fastest steps to install wordpress MU.
I assume you already have mysql db,user and password.
example ;

db : wpmu
user : wpmu
pass : wpmupass

IMPORTANT :
1. We don't need to edit wp-config.php in our wordpress dir.
It will automatically create when we have finished install wordpress MU

2. delete .htaccess or move .htaccess to .htaccess-bak

Now after you've done 2 important steps above :
You can install your wordpress MU from browser ;

http://testing.com

It will automatically direct you to an install page.
Just input all db information and your site name , domain name and your email.
click next and you're done smile.gif

Happy blogging.