ORIGINALE 1

Hi everybody, I'm new to houdini and i try to learn by watching tutorials. Yesterday, i was trying to make a basic Flip sim with a Flip container and a a flip solver, and when i checked waterline, i was able to see my waterline made of sphere as normal. but since this morning i'm trying to make the same setup but i can't see the waterline appearing no matter what i do. my container fills up entirely with sphere only when i uncheck inmplicit bounds in the flip container parameters. Please tell me how to solve this.

(Edited: Please don't use ALL CAPS in your subject line. Thanks!)