Can you check if it by accident appears two times in your scenery library. Had this happen to me too. FlyTampa's St. Maarten will activate itself after installing and sometimes it shows up twice thus cancelling itself out.
If it does, uninstall the scenery using the uninstaller. Go to your FS folder and delete
every Scenery.*** you find except Scenery.cfg (.bak, .txt, some will show as OldScenery.cfg and so on). Empty your trash can, restart your pc. Re-install St. Maarten and DO NOT allow it to self activate (you'll get the option). Activate it in your Scenery library and check again if it shows up only 1 time.
Crash

PS. If it still shows up two times (could happen after a few restarts of FS) open your Scenery.cfg in wordpad and delete the second entry of St. Maarten. But try the first option first.
Last edited by Sir_Crashalot on Wed Sep 30, 2009 10:06 am, edited 1 time in total.