car door water leak

i own a 2014 nissan altima and when i opened the door panel to remove my speakers i noticed they had some water dripping on them, i poured water on the window from the outside of the car and noticed water leaks to the inside of the door panel, i replaced the door window moulding or the weather strip whatever its called and still when water poured on the window from the outside water still leaks inside the door panel ( a good amount of water), what could be the problem if it isnt the weather strip/door moulding?