How long has this been going on? I remember I used to have such issues for a while when I first learned lucid dreaming but I kept it up and eventually issues went away, so tenacity is one method. Do not say that DILD is not working for you. It is working. You are becoming lucid briefly. Your problem is that you are not sustaining lucidity. Stabilization techniques might help with that, like as soon as you realize it is a dream focus on your hands for a while and will the lucid dream to become more stable. Also be sure to think of even those short lucids as successes, and will yourself to have more lucid dreams but do not tell yourself "but not like that" since that might send you mixed messages.