If you simply install this great plugin it will only work for super admins creating sites within the admin panel. If you want this plugin to also work for visitors creating a site by registering from the front end of your site you must make a couple simple changes.
1. create a folder called “mu-plugins” in the /wp-content folder
2. move the “default-blog-options” folder from /wp-content/plugins to the newley created /wp-content/mu-plugins folder
3 move all of the files and folders WITHIN the “default-blog-options” folder to the root of /wp-content/mu-plugins
Once you have done this wordpress will automatically detect that the mu-plugins folder exists with files in it and execute them. This will allow your default blog setting to work for all blogs created on your site.
‘Fatal error: Cannot redeclare add_blog_menue_page() (previously declared in /home/driversz/public_html/wp-content/mu-plugins/default-blog.php:53) in /home/driversz/public_html/wp-content/plugins/default-blog-options/default-blog.php on line 54’
I’ve found this didn’t work for me, but did get it working by activating it site wide rather than network wide
If you go to default blog installation instructions, it says at step number 3:’ Activate the plugin Site Wide through the ‘Plugins’ menu in WordPress’
Therefore you will find the settings under Tools/Default Blog under Site Admin and after configuring, it works like a dream!