Error message in RSS widget

Hi,

i'm tring to use tag feed plugin, i installed "post indexer" plugin (i have in my database the two tables wp_site_posts and wp_term_counts) then i uploaded "tag feed.php" on wp-content folder and the i copied the url of my feed for tag "cinema" (i have just one post cause i'm at the begin) "http://www.legnanoweb.it/wp-content/tag-feed.php?tag=tag_cinema" in the default "RSS widget reader" of WP (i'm using 3.2.1), but it give me this message: "Errore RSS: WP HTTP Error: Recv failure: Connection reset by peer" ... i wrong something? can u help me plese??