UPDATE YOUR WOW TO RETAILS LATEST PATCH.
Well, I figured this out the hard way.
1. Make sure you have downloaded our launcher from
http://www.icecold-wow.com/downloads
2. Move the launcher to your World of Warcraft folder.
3. Run the launcher and click Play. When on the log in screen, log in with the info you signed up with on the website.
4. If you get any errors after that, run IceColdLauncher as Administrator and it should work.