i have made two loaves of bread with my new Kambrook and both have been failures. I bought new flour and also new Yeast. It was not until I got home I saw that the yeast expires on the 17 April but surely it should still be ok. I have put the ingredients in exactly as the book says. My last breadmaker would take about 3 hours to bake a loaf and this seems to take 1.5 hours so perhaps this could be the reason. Can you help