hm....
i opened the script editor, opend the script from my desktop.
so the code of the script appears in the upper part of the script editor.
ok so far...
then i marked everything und moved it by holding the middle mouse button in the shelf bar.
there my new MEL icon appears.

in draw my curve, aktivate it and pressed the new mel icon...but nothing hapend,-))
what is the fault?

by the way: the script should create a tube out of a curve, i have downloaded that here in the forum.