I baked (or tried) to bake some zucchini bread last night. I used shredded zucchini that I had shredded this fall and frozen in 2 cup batches. I thawed it. Squeezed all the liquid from it. Mixed all my ingredients and put it in the oven. Everything was looking great until the timer went off and when I saw my bread it had all fallen to the center. What the Heck happened?