This IS the SimuFly CIVA INS (v160x64) you're using?

Going on the assumption that your answer to my question is yes.

Once the INS is aligned and set to NAV, and you have entered the waypoint coordinates for the route, all you need to do for the L-1011 II to follow the route is this:

1. Have the NAV Source Selector set to VOR (DO NOT set it to FMS or ONS!!!)
2. Turn the HDG Mode Switch ON
3. Turn the AP on (flip either AP Switch A, or B, to the CMD position)
4. Turn the SimuFly CIVA INS's INS NAV Switch (this is the NavModeSingle gauge) ON

Doing that, the L-1011 II should follow the SimuFly CIVA INS route.

For some strange reason I can't attach an image to this Reply/Topic, so I'll upload a video on YouTube showing you what I do, just so you can see it in action.