I am taking a tutorial and I'm stuck. I'm trying to "exclude overlapping shape areas", but when I click on that button above, nothing happens. I'm trying to punch a hole through the circle basically. It's strange because this process worked earlier for me, but now it's giving me trouble. Here are some pictures to better explain what I mean. The first picture is the tutorial. The second picture is a screen shot from my project. Thanks in advance to anyone who takes the time. 
