iFrame not working

I am trying to bring my cafepress store into one of my webpages via the iFrame that we can do in Fusion. It shows the border well enough like it should be coming in but nothing happens. I have the correct address and everything. Any ideals why it may not be working.

I even just got the regular HTML iFrame code and tried it that way and still nothing. Before, a long time ago when I did a similar website and I iFramed my cafepress store in it worked just fine, I can't figure out why it is not working this time. Any help or thoughts would be appreciated. If I can't get it to work I may have to link directly to the store but I would prefer to try and have it come in through the website for a better look.