My wife recently bought me a Cuisinart ice cream maker for my b-day and I love it...for ice cream. It always turns out creamy, rich, and delicious. But when I try to make frozen yogurt, it ends up icy and hard (although still tasty). Has anyone else run into this problem? Basically, I take strawberries, lemon juice, and sugar, puree it, and use a hand mixer to mix that with plain yogurt. Then I refrigerate the mixture for a few hours, and churn it. But it seems to be too thick (or something) because the machine turns off before the yogurt is completely frozen, then when I freeze it in the freezer, I end up with a solid block of yogurt. Any suggestions? Thank you.