Programming cox remote to control tv on/off and volume

I have an LG tv that it am having trouble programming the remote cox gives you to control the tv on/off and volume.  It worked with my previous tv.  It tried following the instructions that are in my standard guide from cox pressing select and mute, waiting until tv button flashes twice then holding select only until the device turns off, but it does not work.

I am looking for some help to get the tv programmed on the cox remote.