For some reason, there is a problem with the CSWeapon.xml file in the Aircraft\CS_LX-45 folder and all the other aircraft you are adding it to.

There could be something wrong with your installer (csw001_1000.exe), or the activation didn’t work properly. When the ammo displays 0000, then there is a sytax error in te CSWeapon.xml. This is why I think that the installer or product activation is faulty. If this is the case, then:
Check-in to Your Profile > Product > Extended Download Service > Get New Links and download a new installer.

In the mean time, I replied to your email and sent you a copy of my CSWeapon.xml from my FSX\SimObjects\CS_FA-18 (without unlimited ammo). You can change that yourself if it works.

Mark