Capturing planets in Simultaneous play

[Dragonlord]

Hello all,

I have a new question for y'all. It has to do with capturing planets
from the AI in a PBW game.
I have a large attack fleet in orbit of an AI planet. The fleet contains one
cargo ship full of troops. The enemy planet only has about 50M in
population, so I don't want to shoot at it in fear of destroying it. However
the planet has a missile platform on it. My fleet has plenty of PD to deal
with the missiles.
My fleet orders are "Capture Planet", with "don't shoot at planet". The ship
type orders for the cargo ship are "Capture Planet", with primary movement
of "Drop Troops if carrying" and secondary movement of Optimal Weapons
range. (that is pretty much the same as Dont get Hurt since the cargo ship
has no weapons).
What I want my fleet to do is move up to the planet, shoot down the missiles
(but not the platform), and drop troops which can then destroy the local
militia and the weapons platform without damaging the population and
facilities too much. What actually happens is that my PD ships mill around
the planet shooting down missiles, while my cargo ship runs to a corner.
Does anyone know if I can accomplish what I want, in Simultaneous play?

Thanks in advance,

Dragonlord