If you are using Windows Vista or Windows 7 and Flight Sim X is installed in the default location (C:\Program Files\), you might need administrative rights to be able to save any changes.

Do you have permission to edit the file? I would assume, but just try this:
Go to the CSWeapon.xml and right click. Click "Properties" then click the "Security" tab in the window which will appear. Find the button that says "Edit" and it will open a new window. In the top list box, click your user (it should say something like Users- David PC). In the bottom list box, click the top check box (Full Control), then click OK. Hopefully that made sense.  

I had the same problem with the rockets. For me, I think it was because my laptop (even though I have upgraded it) cannot handle 60 rockets firing at once. What you're going to want to do is press CTRL+SHIFT+8 a few times until the HUD displays "1+4". This will fire two rockets at once, one from the 1st batch, and one from the 4th. When you have used 60 rockets, change it to "3+2" to use the remaining Zunis.

If you're not seeing effects, select "Run as Administrator" from the context (right-click) menu.

Great Boeing247 are the best thanks to your advice I now everything works ok, the Captain Sim is lucky to have someone like you ', good and accurate.
Hi and thank you!

Oh, sorry, a context menu is the right-click menu. I do some programming, and I lapsed into programming lingo.  
I just meant to select "Run As Administrator" from the menu on fsx startup, but it sounds like you already know how to do that.

That's odd. Usually running FSX as administrator will fix that (you are running as administrator, right?). If running as administrator doesn't help, then perhaps reinstalling might. 

boeing247 wrote on May 1^st, 2011 at 5:28am:


Thanks Boeing, I installed using the default user which has admin rights but have not been using the "run as administrator" to launch FSX.  I'll give it a go.  This might explain why the XP install works and the Vista and Win7 don't.  If it doesn't work I'll re-install.  Is there a "run as administrator" option for the set-up also?

Canuk

Hi Canuk.

If you have FSX installed in the default location, C:\Program Files\Microsoft Games\Microsoft Flight Simulator X (or C:\Program Files (x86)\etc.... for Vista/Win7 64bit) then it is best to run FSX as administrator because of the strict protection that those operating systems have on Program Files and Program Files (x86).

Using Windows Explorer (Start > Computer), go to your FSX installation and Right Mouse Click on the fsx(.exe) and select Properties from the menu that pops up. Select the Compatibility tab and place a tick (checkmark) in the box beside "Run this program as an administrator" then click OK. FSX will now run in administrative mode and you will be asked "if you want to allow this program to make changes on this computer" every time you start FSX, but in the end it will be worth it to have things working properly in FSX.


This screenshot shows how it looks in Windows 7

Mark