You have called the GSX menu ( by default CTRL+Shift+F12 ). When you are on a FSDT airport that has a YouControl menu, you should use the YouControl key instead ( by default CTRL+F12 ).
If you changed these keys using the "Key Mappings" from the Addon Menu, they might be different. And/or, if another add-on has used the key currently assigned to the YouControl feature, you must either configure it to a different key from the Couatl/KeyMappings menu, or configure it in that other add-on, so it won't conflict.
