Results: Any suggestions on how best to get rid of mildew/mold smell in our house?

We live in a log house that was built in 1930. We have lived here now for 12 yrs. Over the years you could smell a mold/mildew scent. These last couple of years it has gotten a lot worse. In my bedroom there are 3 walls of block/concrete and the smell is even very bad here. I have tried every thing. I can't see where that mold/mildew is growing.