I have a Late 2011 MBP running OS X 10.7.5. In System Preferences > Trackpad, for the "Secondary click" item, I have:
1) The "Secondary click" check-box checked.
2) Selected "Click or tap with two fingers" in the pull-down. Alternatives are:
* Click in bottom right corner
* Click in bottom left corner
With this setup, in Horizon View Client 2.0, if I tap 2 fingers on an object (e.g. a file in Explorer), I get the
equivalent of a control-click (i.e. the right-click pop-up menu).
Hope this helps.