In order to see your team forum, where all the mission planning is done, you need to be a member of your team group. You first need to be registered and activated by an admin on the forum. Then follow these steps:
Make sure you are logged in.
Towards the top right of the forum, click on your name.
Select User Control Panel.
Go to the Usergroups tab.
Select either Royal Air Force or Luftwaffe.
At the bottom (Join selected) click Submit.
Then one of your team's group leaders will need to grant access.