Hi Rick.

If you are using Vista or Windows 7, try running the Weapon for FSX LOADER as an administrator.

To do that Right Mouse click on the Loader, and select Run as administrator from the list that pops up.

To make it so that it will always be run with administrative rights, Right Mouse click on the Loader, select properties, select the compatibility tab, and checkmark the Run this program as an administrator. From then on it will be able to make the changes required for it to work.