Adjusting a Wooden Plane

Beginner's luck has run out. I'm having trouble readjusting my new Knight Toolworks smoother, and I know it is my fault. After a quick search, I found two tutorials on adjusting wooden handplanes. One at Knight Toolworks, and another at Jeff Gorman's site. I think my problem may be solved by the word "tapping". Am I hitting too hard? I'll let you know.

While searching I found an interesting interview with Steve Knight.