Why didn't my pecan pie set up?

Hey, everyone.
I made this recipe : http://www.marthastewart.com/recipe/chocolate-pecan-pie-everyday-food?backto=true&backtourl=/photogallery/thanksgiving-pies#slide_4

I followed all of the instructions and added all of the ingredients, but after I allowed my pie to set over night, I cut into it and syrup was in the middle! :(

I think I might not have cooked it long enough. But the top of the pie is a caramelized crust. It totally cooked the top!

What does everyone think? What went wrong?