found another way to add thelink go to the site irinn.ir
and then go to its sublinks from your n900
then on the default browser press plus sign located on the left down side next to back button,u will see subscribe to feeds (something written in urdu) ,if yoy dont see it try this link in browser

http://irinn.ir/Default.aspx?TabID=6

and then press plus u will see subscribe,the feeds will get automatically subscribed

then check your rss