The zoom view on your track ir is not a LOMAC axis. You enable it on the TiR software. The various view axis vary depending on the game ans your TiR like has already been noted. The zoom didn't come about at all until TiR3 I think. Assuming you have a 3 or better- Only LOMAC FC recognizes the zoom.
LoMAC 1.02 or older sees yaw/ pitch only.
SO- if you have a TiR3 or better, and you have FC, look in your TiR software, and turn the Z axis on.