Frustration in Manifesting

First of all I want to thank you for your wisdom and insight. I have a two part question. I finally realize that we create our lives and I read the books “Conversations with God” and “The Secret” and of course your books. They all say how to create the life you wish and how you can change your life by your thoughts and feelings and think of what you want and not what you don’t want. Does the soul have something to do with not having what you want, because I would love to live a better life and to have more money? If the soul has other plans for me then, can I convince the soul that this is what I want and how do I do that?
My other question is: I get myself so excited and happy about creating a better life and then nothing happens, then I get depressed and give up for a while, then I’m back at it. Why doesn’t it ever happen?