There have been a lot of problems with that the levels aren't sticking, I'm going to show you the correct steps...

Text Tutorial

Step 1:
Private Chat -> xX Xenon Tag Xx

Step 2:
Check for the file called XP Lobby and download the video for playback.

Step 3:
Go to play team tactical.

Step 4:
You will get in a lobby with mostly level 1's and people with the clantag [HOST]

Step 5:
Once the game beings you kill yourself 4-6 times.... if u want to be sure check the XP bar and make sure its at 0.

Step 6:
Now once your level 50 you wait to become the host of the game, then you back out. YOU ONLY BACK OUT WHEN YOU BECOME HOST OF THE GAME!!

Step 7:
Next you prestige. Then you press 'B'.

Step 8:
You should have options such as, xbox live, local, options etc.... PRESS MAIN MENU!

Step 9:
Then reload and go to Multiplayer.

Step 10:
Then once it loads follow these steps, click Xbox Live then press Player Match.


Step 11:
Prestige again.

Then continue to do steps 1-11 until 15th Prestige.

MAKE SURE TO WATCH VIDEO WHEN U RELOAD MULTIPLAYER!
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Any problems or questions post below. - Ross