Now it seem to work.
But I've many problems:
1: from feed, I cann link, and the result is this:
Not Found
The requested URL /canon-powershot-a630-p-964.html&language=it was not found on this server.

The right link is with ?language=it not &

2: I've setup in admin section max new product to show to 7 (7days) but my feed show all products