How do I set collision on my glider avatar?

I am trying to create a glider simulation for one of my classes. My glider avatar was made in 3DSMax if that makes a difference. My problem is that I set either a mesh or box collider on my glider, and when I start the game the glider drops to the floor. When I take the collider off the simulation runs as normal. How do I set a collider so it flies and collides with other objects?

Set the collider to isTrigger = true and use the OnTriggerXXXX functions!