Don't create a new subject for the same thing that your last one here : scirra.com/forum/water-effect-problem_topic70303.html
As you didn't get any response, nor linked any capx, I'll try to help you as much as I can here.
If you want your object to stick to the surface of the water when it hits water, just translate my last phrase in C2 :
Object On collision with Water -> Pin Object to water (position & angle)
You will have to add a "Pin behavior" on your object to do this.