Stephent91 and Clairity are both right. Start with simple control tasks. Get the feeling of the dream by walking in this dream and touching the surrounding objects.

My advise to you would be to narrate your dream, i.e. talk to yourself while you are dreaming, saying things like : "I'm dreaming, I'm going there, I am touching this object…"

Only after you feel grounded in the dream may you start "ordering" things to happen in an imperative manner. Talking to yourself while dreaming helps : "Now I shall fly high ; now I shall walk through this wall…"

Keep on trying.