[TYPO3] real url and 404 error

[Katja Lampela]

Hi,
I installed realurl and changed the .htaccess-file and the 
localconf.php. Now I have the addresses look fine but they don't 
actually work: I get the 404 Url not found on this server error.

I've also tried to enable mod_rewrite and allowAll in the httpd.conf and 
my htaccess-file looks like:

RewriteEngine On
RewriteRule ^typo3$ - [L]
RewriteRule ^typo3/.*$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule .* index.php

And setup is (I have Typo3 3.8.1):
config.simulateStaticDocuments = 0
config.baseURL = http://www.mydomain.com/
config.tx_realurl_enable = 1

I'm wondering if the problem is in my typo3-configurations or in the 
server-configurations. I'm really running out of ideas so any - even 
tiny tiny bit of - information is greatly appreciated.

Sincerely,
Katja