WotLK DK quest stuck

[Numbersman]

Im doing the DK questline for the first time and after I do the quest where you turn in the arrows no more quests pop up. I know there is more to it and I cant leave the starting zone until I finish the questline. Ive already reinstalled the game tried clearing the cache, and making a whole new DK. Any suggestions?

[Justmarried]

You can find information here http://wowwiki.wikia.com/wiki/Death_knight_quests

[Numbersman]

I figured it out. In the field with a house there is a mailbox that has a letter on it. Grab the letter and you can continue the questline.