floating actor [Solved]

I have a problem with my actor. When ever he is standing on a tile he floats a little above it and i dont know how to fix it is it a problem with my actor or what? His name is Blue Guy and I downloaded him off of Stencylforge.

When you placed him down, did you place him near the ground?

yes i snaped him in the nearest box and when he walks around he is also floating

Make sure his collision box is set properly. It may be larger than the graphic, so he appears to float.

Is gravity on in your scene? Is Blue Guy affected by gravity?

Make sure that:

1) Gravity is set in the Physics page of the scene.
2) Gravity is enabled for the actor.
3) The collision shape is correctly set up (like coleislazy said).

Hey thanks everyone the only thing that was wrong was the collision box setup.