You really cant expect it to work the first time, mate. The problem was most likely this: your subconsciously getting excited (similiar to adrenaline) you may not be thinking it, but your mind is feeling "hey this is new and this is cool" and when you get excited it doesnt allow your body to finally enter that 100% sleep, so you never reach your lucid dream. Keep at the WILD until it becomes very natural and eventually it will work.