You have problems either because the software are not installed correctly or they weren't removed completely before re-installation. In order to fix the issue, remove completely the FSX Deluxe program and the Airbus fleet (Control Panel > Uninstall a program) and run a registry cleaner to make sure that there are no leftover registry keys in your system. After that, reboot the PC, install FSX Deluxe, reboot again the computer and install the Airbus fleet. If you still have problems, I recommend you contact Abacus, the developers of Fly The Airbus Fleet for FSX.