Everything ThreeCat says is true. On top of that I will add that at first the brain is shocked when you suddenly become aware in a dream, and it tends to shut things down in a danger response. Remind your inner self that you are going to be working on becoming aware in dreams and that it is a good thing (do this in your head alot while awake, as if addressing a child). It takes some time to get past this, perhaps 10 or more lucid dreams.