Can't create Dk

hello to everybody! im new here, and the first thing i want to ask you i patience haha (i mean, dont know if this is the right place for this topic).
The question is: I have leveled a druid to 55's and tried to create a DK. but the character creating screen tells me i can't create it because i dont have woLk nor a lvl 55 char. how can i solve it? i have a print screen of this, but i dont know how can i set that on this post too (damn technology) haha. Thanks for any help :D

because wotlk isnt released on Lord yet.

10th of dec is the date we've been given for possible wrath launch. So until then carry on levelling your druid.

oooh, they aren't dks at lordaeron? haha that makes sense, because i didn't see any dk in game haha! Thanks a lot. And what about the release: Dou you think must we download any patch for playing with Dks, or it'll be automatically available ? Thanks :D