WordPress MU

This is the url:http://blogger-off.com/wp-admin/wpmu-edit.php?action=updateblog
This is the error:
Forbidden
You do not have permission to access this document.

Im just trying to change a few settings for the default blog, the one that exists before any other has been created.

I would also like to somehow change the default page (http://blogger-off.com) so that the default blog shows up, and not the default page.

Any help or suggestions would be greatly appreciated.

Addition

Also getting this error on all pages after activating a theme (not sure if it matters which theme) :
Fatal error: Cannot redeclare mytheme_about() (previously declared in /var/www/vhosts/blogger-off.com/httpdocs/wp-inst/wp-content/themes/2Exquisite/functions.php:69) in /var/www/vhosts/blogger-off.com/httpdocs/wp-inst/wp-content/themes/2Exquisite/functions.php on line 68

Fixed the front page, just changed the template from the mu one to the standard. I also decided to remove the themes that were causing the problem.

Another problem came up while playing around, the password protect post. I can create the post with a password but when trying to acces it I get: Error 404 - Not Found, and the url that the submit button went to was:http://blogger-off.com//wp-pass/

another bug, I think - when editing some pages (found it in the edit page section) the type cursor continually jumps to the first field, making filling out forms a bit akward.