Making animation

Following what the tutorial doing on the internet, there was something wrong with exporting .ive file to BuildAR. As showing below, the only thing I can do was to make a box and move it first.

It seems 3ds max only allows me to export the moving of a simple shape object.

Then I used the tool "link" to cannect the boats and the box. So the boats will run at the same rate as the box moves.

I tried exporting with hidding the box but the boats disappeared as well.

This was the final result. I kept the box far away from the boats so we won't see it in a certain range.