Roger

Just to let every know what was the issue, I was highlighting the click with the "time selection tool". in the single click process, what is required is the use of the "Paint selection Tool" when using the "Single Click Removal" under the effects menu. Also the Auto Heal Works well too! It's just it bit more advanced in the way you do things in the more recent versions of Audition compared to Cool Edit 2000.

Roger.

I'm not quite sure what you're doing to get that box--what should pop up is a menu box with lots of things you can control in terms of the click elimination.

However, may I suggest a better way to deal seamlessly with a single click that didn't exist in earlier versions?

In Waveform view, turn on the Spectral Frequency Display (either a box on the menu bar or Shift+D as a shortcut.  Find the click and zoom in nice and tight on it.  Select the "Spot Healing Brush" tool (picture of a bandaid).  Set the pixel width to be just wide enough to cover the click, Click and drag the length of the click on the Spectral Display and, when you let go, the click will be eliminated and the sound filled with the average of what's happening either side of the click.  Usually this gives a completely seamless repair.  FYI this works on a lot of other noises as well--a bumped mic, slamming door, whatever.