I feel really stupid but I don't seem to be able to place agents anywhere. I've tried everything I can think of but when I use the agent icon that replaces the cursor and place it on a planet and click nothing happens. I've also tried activating the agent icon and pressing the spy button on an opponents planet and then placing the agent on the desired improvement and clicking or double clicking the left mouse button and the same for the right button and still nothing happens. Please someone help me because it's driving me crazy. Thanks.