My b2evolution Version: 3.3.3

Hello all

I don't know if anyone can help me with this.

My b2evolution is installed at example.com/b2 [example.com is literally that, an example]

I would like people to see a the following url for my site: http://www.example.com
At the moment it is http://www.example.com/b2/blog1.php

I followed the instructions at http://forums.b2evolution.net/viewtopic.php?t=17685

and made this .htaccess and uploaded it to public_html

#===============
# CATCH EVERYTHING INTO B2EVO:

<IfModule mod_dir.c>
DirectoryIndex index.php index.html
</IfModule>

Options +FollowSymlinks
RewriteEngine on
RewriteBase /b2/

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ blog1.php
----------------
I then went to Dashboard > Blog settings > URLS and changed the Absolute URL to http://www.example.com/

It doesn't work though, it just goes to my index.html page Is there anything obvious I'm diong wrong?