Rewrite category permalink

Hi there!
I’m trying the rewrite a couple of categories that belongs to a parent category. Here’s an example where stockholm is a child of town.

http://example.com/category/town/stockholm => http://example.com/town/stockholm

Here’s my htacess-file.

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^town/([a-z]+)/?$ /index.php?category_name=$1 [L]
</IfModule>

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

But it isn’t working, it just takes me to 404.php. So I would love to get some help!

Thanks in advantage!