hi, thanks for your fast reply ...
In VM configurations (VM 2.6.14) -> templates -> category feed setting , i use:
Enable Product Feeds : Y
Include Images into the feed? : Y
Include the Product Price into the description? :Y
Include the Product Description? Y
Type of Product Description : short d.
Maximum Description Length : 500
No have setting other, no in VM , no in J. .... maybe I have to enable some other setting, or some module / component in joomla?
unfortunately I can not see next to the categories of the store button feeds ....
i have try your url but no see nothing

..... you can try my website is
www.ilcompatibileshop.comthanks
..... solved ... need to apply the module rss
thanks
Bye