[1.7.2] Getting chest inventory

So, my tile entity can't get nearest chest inventory, my tile entity founds chest and reports that he found chest to chat, but he can't get this chest inventory. I want to my tile entity check chest inventory and if inside the chest is wooden axe it returns true. But it not working 

Please help me.

And here is my code:

I don't know what here is wrong...

public void updateEntity(){
	super.updateEntity();

	if (shouldCut){
		if (hasTool()){
			chat.printChatMessage(new ChatComponentText("Tool found!"));
		}else{
			chat.printChatMessage(new ChatComponentText("Tool not found"));
		}
		shouldCut = false;
	}
}

public boolean hasTool(){
	for (int i = 1; i > -2; i--){
		for (int j = -1; j < 2; j++){
			if (this.worldObj.getBlock(this.xCoord + j, this.yCoord, this.zCoord + i) instanceof BlockChest){
				TileEntityChest te = (TileEntityChest) this.worldObj.getTileEntity(xCoord + j, yCoord, zCoord + i);
				IInventory teInv = null;
				teInv = (IInventory) te;
				int invSize = teInv.getSizeInventory();

				if (te != null){
					chat.printChatMessage(new ChatComponentText("Chest found!"));
				}

				for (int slot = 0; slot < invSize; slot++){
					if (te.getStackInSlot(slot) != null){
						Item slotItem = te.getStackInSlot(slot).getItem();
						if (slotItem == Items.wooden_axe){
							return true;
						}
					}
				}
			}
		}
	}
	return false;
}

It should work, but when I place wooden axe in nearest chest, it report that "Tool not found".

What's wrong with it?

It seems that "getStackInSlot()" always returns a null