CastRay for Terrain Material help?

Ok, hopefully this won't be as confusing as it sounds.
I added into the CastRay the functionality to access the TerrainMaterial, what I want to do is to access a bool modifier I made inside the TerrainMaterial.cpp called slush. Once the player hits this "slush" I'm trying to get it to slow him down, by an integer I put in to the TerrainMaterial.

this is somewhat my code right now.

if(getContainer()->castRay(delta.pos, Point3F(delta.pos.x, delta.pos.y, delta.pos.z - 2), TerrainObjectType, &TerrCol))
   {
	   if(TerrCol.TerrMat->slush)
	   {
		   //Make the slush slow me down
	   }
   }

Now this code works, until I try to actually start messing with the forces of the Player. It builds with no errors, but in-game as soon as I move it crashes.

Any help is greatly Appreciated.
Thanks again.