Drop troops on planet in Strategic

[Jestak]

Greetings,

After I read the exact recipe to drop troops on strategic, and all the posts about it, I can't make it work. It works on tactical, but strategic, I have still a problem. I am sorry, but I think there is something I don't catch. Here is what I do:

1 - Create a fleet with 5 transports full of mean troopers. I know it is enough to capture the planet. I did it just before (I save/load games) and I had more than 70% troops left alive).
2 - Add enough warships to the fleet to kill the satellites, fighters, weapon platforms and ships around and on the planet.
3 - Set the fleet strategy to capture planet and I use the wall formation (I tried with spider, arrow and a few others).

My fleet kills everything that defends the planet, but my troops don't land.

It says in a few places you must set the ship strategy to capture planet for the transports. Where do I do that exactly (Precise click please)? I never found it. It may be why it is not working.

Thank you