404 Login to index Issue

[x33Pingu]

After I run the setup and I try to log in but he keeps me on the index page but he does not find it. I think my .htaccees works fine but idk where my problem is.

[.htaccess]
RewriteEngine On
RewriteBase /support/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule . /support/index.php [L]