First of all, are you His child? If God is not answering, maybe you need to work on the relationship with Him first.
Second, are you accepting all answers, or are you looking for a specific one? Sometimes we already know the answer, so He doesn't bother. He gave us the basic decision-making guide, so maybe your answer is already in there?
Third, God takes His time. Sometimes He wants us to find out for ourselves, or make our own choices. God is not a fortune teller - He knows, but usually he doesn't tell. More often he reveals His plan slowly over time, and you are only a small part of the plan, so it is on a need to know basis. :)
Rephrase your question, and ask God to reveal His plan and the next step for you to take. Make sure you are looking for His answer to be righteous, for God will never ever lead you to do something that is wrong. It might be hard though, so be ready for that. Ask for wisdom, ask for patience, ask for clarity. Ask for strength to accept a "no" or a "wait." He is there, and He hears you. Keep listening.