<SOLVED> btGImpactMeshShape gravity problem

[motionphase]

I created a btGImpactMeshShape mesh shape, then created a rigid body from it. The problem is that for some strange reason, gravity no longer affects the body. What am I doing wrong? I tried the same thing with btConvexHullShape and still no results. However, regular cubes and spheres work fine.

Update: I forgot to add the body to the world.