sortOn String + NUMERIC

Hello Peepz,
i’ve got some trouble with the following sortOn method (i’ve got strings that contains numbers ex. “Help11”):


activeCourseArray.sortOn([sortMethod, "AudioSort", "Name"]);

the following array items need to be sorted like this:


"Alpha", "Beta", "Help1", "Help2", "Help3", "Help4", "Help5", "Help6", "Help7", "Help8", "Help9", "Help10", "Help11", "Help12"

but i get this:


"Alpha", "Beta", "Help1", "Help10", "Help11", "Help12", "Help3", "Help4", "Help5", "Help6", "Help7", "Help8", "Help9", "Help10"

I tried this but then i got more problems:


activeCourseArray.sortOn([sortMethod, "AudioSort", "Name"] , Array.NUMMERIC);

Can somebody fix this?
Thnx Already