those damn paper stars

[http://users.livejournal.com/_killthegirl_/]

I don't know WHAT my deal is but for some reason I can't successfully make those little paper stars
I followed the tutorial at chupette.net
and I THINK I'm getting the folding correct
but when I go to pinch the sides and make it star-like it just dents all in and I can't even get all the sides to pinch

is there anyone that can offer some help..I'm about to explode

thanks
-kate