hitskin installation not working

Hello,
I am trying to install a hitskin skin, and when I type in the domain name of my forum (it is invisionfree by the way) it won't work. It says I have an invalid domain or something. I have tried registering a test forum just to make sure, and it still doesn't work. The skin type was indeed invisionfree, and the personal was set to No on the skin information. I don't see why this shouldn't work for me! I am also the admin of my forum as well.

Couple of things:

First: This topic should have been posted in the Hitskin.com thread, but that's besides the point

Second: When you type in your forum URL. You need to include the http://www.