I think I know what I did I put the wrong serial key. I put my order number instead of the serial key in the receipt. But I guess it still accepted it.
No, if it asks for your Serial Number, you have to put your Serial Number, you can't use the Order Number in its place.
I uninstalled the phnl scenery to put in the real key and now it won't let me change the serial key.
You don't need to uninstall the scenery to correct a Serial Number that was typed wrong, only select "Register Serial" again.
Besides, if you insert it wrong, it would fail the activation so, it will NOT lock you out from inserting another one, the "Register Serial" function is available, until the Serial Number is successfully activated, only then it disappears. So, if you can't access it, it means you have typed it right. Otherwise you would see the scenery in Trial.
In any case, the most important thing is, NOTHING of this, is related to the Activation. The Jetways are NOT, in ANY way, related to the activation. In fact, they are the only thing that remains visible when the Trial ends. You can lose your activation, type the serial wrong, put a fake serial, it won't matter: jetways will ALWAYS show up.
If you had an activation problem, the scenery would run in Trial version, with everything on, for 5 minutes at a time, jetways included. If what you miss are ONLY the jetways, then it's 100% sure it's NOT the activation or anything related to it.