What is causing this??

datablock ItemData(Crossbow)
{
   // Mission editor category
   category = "Weapon";

   // Hook into Item Weapon class hierarchy. The weapon namespace
   // provides common weapon handling functions in addition to hooks
   // into the inventory system.
   className = "Weapon";

   // Basic Item properties
   shapeFile = "~/data/shapes/crossbow/weapon.dts";
   mass = 1;
   elasticity = 0.2;
   friction = 0.6;
   emap = true;

	// Dynamic properties defined by the scripts
	pickUpName = "a crossbow";
	image = CrossbowImage;
};

datablock ItemData(CrossbowAmmo)
{
   // Mission editor category
   category = "Ammo";

   // Add the Ammo namespace as a parent.  The ammo namespace provides
   // common ammo related functions and hooks into the inventory system.
   className = "Ammo";

   // Basic Item properties
   shapeFile = "~/data/shapes/crossbow/ammo.dts";
   mass = 1;
   elasticity = 0.2;
   friction = 0.6;

	// Dynamic properties defined by the scripts
	pickUpName = "crossbow bolts";
   maxInventory = 20;
};