Respls

Hi, I just completed the quest-chain leading up to "The art of the Armorsmith" but when turning in the quests in Tanaris which would have awarded me with the recipes for Ornate Mithril Helm and Breastplate, I never got the items. Resulting in me not being able to learn armorsmithing. I have talked to all the NPC's again but can't retake the quests or turn them in again. Is this a know bugg or did I do something wrong along the line? Thanks in advance, Respls