I agree with everything that prsona said in response to your question. It may just not be your tool. Or, as was mentioned, you may not have asked the right questions. There's a pretty exceptional book - Ask The Right Question: The Essential Sourcebook Of Good Dowsing Questions. The book teaches a lot of thought and detail in forming the questions. I don't think that the questions need to be as specific as stated in the book but it explains why such detail can be helpful in getting a good response.
My personal experience has been that if you are very connected to the process spiritually it can be a very helpful and insightful way to receive information.
If after looking over that book, if you so desire, you still don't get satisfactory results you may want to look into another divination method that may suit you better.
Wishing you much success in your endeavor!