Help with raycasting

Unity Engine
,
1

Im trying to get my interface to respond to a user touch, and I must be missing something as it doesnt work! Yet the debugDraw lines draws exactly where I want to go (See attached image). Ive also tried it with Input.mousePosition. Im using the RaycastAll as the mesh I want to collide with is under a gameObject that I will eventually add at the touch position.

m_touchPosition is a Vector3

My code is below. Im a new user, but very keen to get into the big wide world of Unity! Thanks for any help.

for(var touch:iPhoneTouch in iPhoneInput.touches)
		{
				m_touchPosition.x = touch.position.x;
				m_touchPosition.y = touch.position.y;
				
				m_ray = m_camera.ScreenPointToRay (m_touchPosition);
				Debug.DrawLine (m_ray.origin, m_ray.GetPoint(20));
				
				var hits : RaycastHit[];
   				hits = Physics.RaycastAll (m_ray, 20.0);
   
   				for (var i=0;i<hits.length;i++)
    			{
        			var hit : RaycastHit = hits[i];
       				Debug.Log(i + " " +  hit.transform.tag+"  :"+m_state);
    			}

141432--5168--$grab_198.png

2

The only thing I can think of is that there is a collision component attached to the gameobject. Otherwise it looks on first glance like it should work.