are you trying on live, splitscreen or solo?

if splitscreen/solo then have a 2nd controller ready, then once in the zombie menu log into the prince profile, load call of the dead then once the map is loaded and you see your character, sign out of prince. not sure how to do it on live

To play on live you must do this exactly: (How I got it to work)

The normal way doesn't work anymore. Instead you must do this:
1. Be at dashboard
2. Be logged in with your main account on controller 1.
3. Log in with hacked account on controller 2.
4. launch black ops, but as it is playing the "treyarch" intro video sign out of second controller
5. Play zombies.

bugi1 wrote a few days ago they patched the previous maps
or atleast for me and my friends, verrukt der riese, ascension etc dont work anymore ( we used usbxtaff) i did this the same method i had installed the previous DLC, it worked, but im getting the same message when i try to run escalation as ascension, so im guessing its patched but i dont see anyone else saying so, so am I doing it wrong or is it patched?

thay do work you need to do it like this 1.Go to the dashboard.

2.Sign in to your account on the first controller.

3.Sign in to Black Ops Taco on second controller.

4.Start up Black Ops.

5.You should have the intro, if you don't have it that means you probably skipped it or changed the options on the main menu.

6.When the intro is loading up quickly press the Xbox Guide button on the second controller and sign out.(SIGN OUT AS FAST AS POSSIBLE)

7.Then go to zombies and playxboxlive hope this help

zI CHUCKY x

thanks all, will try once mom gets off the tv