The clicker broke. Depending on the reel you might be able to order a new one and install it or take it to a good reel repair shop. Just think when you were a kid and you clothespinned playing card to the spokes of your bike to make a sound like a motor. That's what the clicker is. They often break even on better reels. It won't change the function of your reel at all, you just won't really know whats going on with your drag. I find it very disconcerting myself. I need the click.