How do you get past the red door in the ocean king temple in phantom hourglass?

First you must check the tablets (if this is your first time) and mark out the symbol they show you (like connect the dots). DO NOT get the middle left tablet, or it makes another phantom appear, just like in the ghost ship, where if you pick the chest where the girl tells you too, a reapor appears. Draw the symbol on the door to open it. Talk to zaus after learning about the phantom sWord to get another symbol. Draw that on the door, but you must not overlap on the symbol or it wont work.