Yet another ball joint removal question

[j.rigby15r]

I am trying to remove the lower ball joints on my 64. I went to Orileys and rented their removal tool. After fighting it for over an hour I've come to the conclusion that either this tool is wrong or I am not smart enough to use it. The problem I am having is when I assemble it according to the instructions all pieces won't fit into the c clamp. It looks like the stud is to tall. Below is a picture of the one I rented. I've seen other pictures and other kits look similar. What am I doing wrong. I am putting one of the discs on the top and one on the bottom with one of the cups sandwiched between the bottom disc and the c clamp. This is done in accordance with the instructions and the picture on the box. Like i said when I do this all the parts won't fit in the clamp. Where am I going wrong?