Can't complete quest : Chapter 13: The Rising Darkness

[Taeyoh]

So, I got the quest ''Defeat the ebondrake and search for a clue'' I got the Letter but could not read it. So I then relogged, And had to do the beginning of the quest again but iI still had the item in my inventory, And the Game will not allow me to Read it or get the ''Read the orders'' section of the quest.
Any help would be much appreciated ^^