I have a shot slowly zooming in on a pair of glasses, and when I tried to 3D track the glasses and create a solid, the solid doesn't move with the glasses, it just sits in one spot as if there was no tracking to begin with. The points on the tracker move with the image like normal, so I don't know what's causing this issue.
An image would help to solve this problem.
Sometime if there's not enough depth information in the shot (like the background is flat or really out of focus) then the camera tracker will only produce a 2D track and therefore will get no depth.
Are you creating you solids by right mouse button clicking on the target and selecting create Solid and Camera?
Have you tried Mocha AE with this shot as if you may get a more soild result from that if the camera is just moving in and causing the glasses to appear scaling up.