Raycast on ForestObjectTypes

Dear All,

I've been trying to raycast trees in a forest object but it doesn't seem to return anything. What I want to be able to do it select an individual tree at runtime, get it's position and ID, so I can then delete it later on. I don't know if any of these things are possible, although there are cryptic references on the forum to the ForestObjectType mask. The script I am using is:

%position = %pos;
   %radius = 20.0;
   %mask = $TypeMasks::ForestObjectType;
   initContainerRadiusSearch( %position, %radius, %mask );
   while ( (%targetObject = containerSearchNext()) != 0 )
   {
      echo( "Found: " @ %targetObject.getID() @ " " @ %targetObject.getModelFile() );
   }

The trees have collision meshes and can be raycast when created as TSStatic objects, but it would obviously be better to use forests than try and write script to dynamically load objects. If anyone has managed to raycast individual trees in forests I'd appreciate knowing how you do this...I've already set the trees as collidable but with no effect.

Many thanks