Ok, I'm having a bit of a problem making a loaf of bread. I could really use some help. The bread is half whole weat and half assorted grains. I mix the wheat flour, yeast, mollases, salt and 110 deg water and then let it sit in a bread prrofer at 90 for about a half hour. The mixture rises beautifully and cretes a nice sponge. I then mix in the mixed grains and extra wheat glutten and kneed for about 10 min. I form two loaves and place then back into the proofer at 90 deg. The dough will rise beautifuly for about 15 min and stop. At this stage they have only risen about 50%, and they will go no further. When I bake the loaves at 375 deg, the bread falls flat.

I can make a beautiful loaf of white bread, super easy. I just don't understand what I am doing wrong with the multigrain bread.

3 C. Whole wheat

1/2 c. Wheat gluten

1/2. milled flax seed

1/2 c. rye

1/2 c. buckwheat

1/2 c. corn meal

1/2 c. oats

3/4 tsp salt

4 tsp. yeast

1 tbsp. molasses

2 tsp. olive oil

1 1/2 +2 tbsp. water (110 deg)

Thanks for the help.