Nostalrius Begins - Quality wow vanilla realm (1.12)

It is not possible to talk to Highlord Taelan Fordring during the Scarlet Subterfuge quest. I am standing beside him with the quest item "Tirion's Gift" in my bag and disguised as a scarlet crusader, and he is just ignoring me
I tried to retake the quest, relogg etc. but nothing worked. The link is a screenshot.

http://gyazo.com/e9e17176fc71dbff851dd159b818c738