Compare to your original post of this content Re^2: Substitution don't work ... and the answer there.

Or, put another way, make sure you read, heed and understand answers before re-posting essentially the same question. Downvoted.

Also, when following up on a prior thread, think carefully whether the remaining question in your mind deserves a new thread (yes, sometimes it does, when buried deeply (say Re: 4 or deeper)... and if it does, please x-reference the original thread.