I am sincerely asking for help on this matter. I have posted this on the other forum, not knowing that these two communities are interconnected.
I have already googled and yahooed about the explanation and I have found none.
With your point taken, I will not request the explanation to be emailed anymore. But rather answered here.
And no, I am not willing to pay.

If I get replies from other places where I posted this question, I will gladly post the answer.
I apologize if I have offended you Willy Duitt and other forumers in any way.