There is only one form in the page, when I set Form# to -1, ZP works. but when I set Form# to 0, ZP says "Not a single element with the specified parameters is found".
Form# all begin with 0, is that right? When there is only one form, I think Form # -1 == Form #0, but Form #0 doesn't work, why?
This is important to me because I have to determine the exact number of Form in my template.