Xbox360 COD Black Ops: Computer Codes

[armophob]

I am way behind on the games, but I am trying to enter the "Computer Codes" on COD and I cannot break free by pressing the L and R trigger.
What am I doing wrong?

[mobandit]

I am way behind on the games, but I am trying to enter the "Computer Codes" on COD and I cannot break free by pressing the L and R trigger.
What am I doing wrong?

Press them rapidly, in succession, don't stop until you're free. Worked for me...