You need to install a VNC server for Windows in order to be able to access your computer from Remoter VNC.
The one recommended is UltraVNC 188.8.131.52, you can download it from here:
(If you’re running Remoter VNC 2.4 or greater, you can now use the latest UltraVNC 184.108.40.206: http://www.uvnc.com/downloads/ultravnc/94-ultravnc-1096.html)
(alternative download: UltraVNC 220.127.116.11)
We also have a video tutorial that guides you through the setup steps: