My b2evolution Version: Not Entered

Hi,
i posted this in the german forum to, but i don't get a response. So this is my second try...
I have b2evolution successfully installed. All sample blogs are up and running.
In the next step i create a new blog based on blogA. I can use this new blog and post some test entry's. Now i want use my blogs with subdomains like this: test.servername.dh instead of servername.dh/test.php.
On the first look it's works, but if i login on my blog, the will be redirect to the entry page. I can't post anything. Also the admin login don't works. I read the manual for MultipleDomains and put the corresponding lines in my b2evolution vhosts and .htaccess.
Here my vhosts:

<VirtualHost *>
ServerName servername.dh
ServerAlias test.servername.dh
UseCanonicalName Off
DocumentRoot /srv/www/htdocs/
DirectoryIndex index.html index_multi.php index.php blogs/blog5.php
</VirtualHost>

And here my .htaccess:

<IfModule mod_rewrite.c>
RewriteEngine On

# This line may be needed:
RewriteBase /

# Redirect anything that's not an existing directory or file to index.php:
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^ index.php [L]
</IfModule>

My Document Root is : /srv/www/htdocs ; my blog Document Root /srv/www/htdocs.

Thanks for your help! :)
Toeffel

P.S. Sorry for my worst english, i hope you can help me all the same.