I tried on 2 different installations but there is no Super Admin menu. I have read all the threads about the most common mistakes - placing the lines the wrong places and I have BOTH these lines in my wp-config.php:
define( 'MULTISITE', true );
When I try to install multiblog WP suggest 4 defines re. security, but if I add them it gets impossible to login. So I have to remove them.
The rest of the lines are ABOVE /* That's all, stop editing! Happy blogging. */
Still no Super Admin menu...
I could sure use some suggestions.