Aircraft Start Position in Multiplayer

I am having difficulty placing my aircraft where I want it when I begin a multiplayer session in FSX. Ideally, I would like to be able to start out at an appropriate gate or parking slot. However, no matter what I try (inputting the desired location through the flight plan, inputting the desired location in the location selection menu, or both together), my aircraft is always placed on the active runway of the selected airport.
Does anyone know what is causing this and how I can place my aircraft at the gate or parking slip when entering FSX multiplayer?
Thanks much,
Darrin
EDIT:
Well, whatever was not working before is working now. The problem seems to have cleared itself up. I wonder if it has anything to do with installing SP2. Who knows? Anyway, next challenge, multi-player radio and voice . . . ;)
Does anyone know what is causing this and how I can place my aircraft at the gate or parking slip when entering FSX multiplayer?
Thanks much,
Darrin
EDIT:
Well, whatever was not working before is working now. The problem seems to have cleared itself up. I wonder if it has anything to do with installing SP2. Who knows? Anyway, next challenge, multi-player radio and voice . . . ;)