To use Snork or Snufkin you require the ScriptX control, to allow them to hook to events from the browser, the control is by Meadroid please visit their site to learn more about the control.

If your security settings in IE are set to default, then you should've been prompted to install it when you visited this page, if not, you may want to download an executable, which allows you to install it without changing your security settings, or from another browser. scriptx.exe is the file you need.