You might want to try reloading your aircraft again. This is necessary when creating an outside view for the first time. Data must be written to the aircraft file, so you must reload the aircraft file to make FSX aware of this new data. You only need to do this one time, unless you create more outside views, then you must reload.

If you don't do this, you'll see an incomplete structure in your outside view.

I have ctrl-r set as my hot key to reload my aircraft file quickly.