Fresh Installation Error

BrunoBFR

I´m trying to install the Vanilla but i get the error 404 message when it redirects to dashboard/setup

I don´t have the config.php file yet, but I changed, rechanged the htaccess, looked up for the TRUE in redirect URL... And nothing fix that...

What can I do to install this software?

My server is nginx and when i install the vanilla 2.1 that has in my host, any link works...

the url is: www.dublanet.com.br/forum

and the htaccess (last save) is like that:

     # Modified
     # If you modify this file then change the above line to: # Modified
     <IfModule mod_rewrite.c>
        RewriteEngine On
        # Certain hosts may require the following line.
        # If vanilla is in a subfolder then you need to specify it after the /. 
        # (ex. You put Vanilla in /forum so change the next line to: RewriteBase /forum)
        RewriteBase /forum
        RewriteCond %{REQUEST_FILENAME} !-d
        RewriteCond %{REQUEST_FILENAME} !-f
        RewriteRule ^(.*)$ index.php\?p=$1 [QSA,L]
     </IfModule>

Can someone help me?

Thanks!