Thanks Mark,
I've another little problem.
In all styles RSS, syndication works in this form only :
http://durchbrechen.com/wp-rss.php
So I tried to edit the themes from WP control panel to change RSS links, and for doing this I had to change files permissions with the cpanel. But....
Cpanel does not accept my change permission orders .... They come back quickly to 0644.
regards
Paolo