This happens to me often when I'm trying really hard to WILD. You just need to relax more and try to really believe that it will happen for you. I posted the other night that I was ready to have a lucid dream and that it was time. That night I had a great one. A lot of times I just tell myself before bed that I'm going to have one. It doesn't work every time, but has worked several times. One good thing about this though is often after several nights of doing what you are describing my resistance gets low and I just give up and let go because I'm so tired and then have a lucid dream. Keep at it and don't give up, it's worth so much effort to have one. It's so much better than I even imagined. I can't even tell you how incredible it is because it's a really not like a dream at all, more like a real physical place you go to. Every time I have one, the whole time I'm there, I'm thinking "How can this even be possible?"
Have you ever had a dream, Neo, that you were so sure was real? What if you were unable to wake from that dream? How would you know the difference between the dream world and the real world? Morpheus