How do you wall jump on assassins creed brotherhood on 360?

(PS3 Controls)

After rescuing Rose (or whatever her name is) from the venetian guards, she teaches you the high jump.

Controls are: From hanging from a ledge, hold the high profile button (R1), Move the left analogue stick forwards and press X. Hold O to grab onto the ledge.

(Xbox translation)

The same only translate R1 into RT, (or the other one on that side), X into A, and O into B