No Tracking after 301 redirect to "www" (2 replies)

Dear Piwik Team,

i have a Problem for which i was unfortunatelly not able to find a solution in your forum.
On our website, we were using piwik for about a year without problems.
But then, we added a 301 redirect in the htaccess which redirects all "example.de" to "www.example.de".
From that moment, Piwik stopped tracking.

It yould really help me a lot if you had an idea to solve the problem :)

For your Info: The Piwik-Installation Folder is in our root ( "/" ).

The htaccess contains the following:
RewriteEngine On
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

Thanks a lot in advance!