Your English is fine :) I'm not a Bungie Employee, but unfortunately I believe that the Iron Banner armor pieces are among the [url=http://www.bungie.net/7_My-Legendary-item-didnt-turn-into-Ascendant-Shards/en/Help/Article/12210]Legendaries that don't turn into Ascendant Shards.[/url] Bungie has not mentioned any reasoning for this particular design decision, but I've seen other posters who have reported similar situations with their Iron Banner armor so this is the most likely reason why.