For yeast dough to be successful it's really important to have fresh yeast. Use dry yeast before expiry date. Pressed yeast must be light-colored, without sour smelling. General proportion is 20g yeast per 500g flour. If the dough is made with almonds, raisins, other add-ins, than it's needed to add more yeast. For dough to rise, all ingredients must be of room-temperature, so take them out of refrigerator an hour before starting making a dough.