I am now seven weeks into a Kamut mother, and things don't seem to be progressing. My bread rises less than in the beginning. I switched to distilled water and am adding between 1/4 and 1/3 cup depending on the consistency of the batter. I am keeping the flour in the refrigerator and the counter mother in a proofer set at 74 F. I was excited last week when the mother seemed to come alive for a couple of days but then it back to only a few bubbles.
I have also had fruit flies for the past two weeks. It seems that I read a solution on the forum for this, but I can't find it now.
I'm sorry to hear that your mother isn't raising breads after 7 weeks. It's a simple, seemingly silly thing, but if you stir your mother a little longer at each feeding to really aerate it, it often makes a big difference.
Fruit flies are talked about on p. 215 of Wild Bread.