Ok, now I know why you use the n0. Thanks.
Yes I use mrc , cause it is easier to use.
Since your script works on my computer, and not in yours, I suggest you to unload all your scripts, and load again only the one that you need, cause there might be another script that you loaded before which suppose to do the same, so you get a doubble echo.
Happened to me when I created an e-mail script which had the input inserted to 2 scripts, and 1 script defected the other one.