"Recently I had some HI but appears only after I decide to stop the wild and this image goes very fast and are only on a little part of what I see the rest is all black."

- I think there it lies. If you had a succesful HI. When you attempt a wild. Are you focusing on performing a wild? Is it true that you let go in this instance and dropped all ur focus. When suddenly a HI appears? I think that is what you should keep doing.

I like a little bite in the middle of the night. When I performed a WILD it was so easy, a small amount of Imagery forms and I do absolutely nothing and just observe it going bigger until I can move into the dream scene and tadaa.