Problems editing autoexec.cfg in a game w/ Vista?

Hey folks-

I wasn't sure if I should ask this here or if there was a different place I should ask.  I installed Silent Storm Gold on my laptop, which uses Windows Vista.  One of the requirements of a cheat code for that game has the user add the line "wirbelwind" to the end of the autoexec.cfg file (minus the quotes, of course).  I've edited the file using Notepad, but it will not allow me to save.  I don't know the error message specifically, but it says something to the effect that the file cannot be changed.  I've checked the user profile settings, and I'm set up as an administrator.  I'm not sure what else to check, so if you have any suggestions, please let me know.  Thanks!

your not running the game at the time right?
right click it and see if its checked as read only. im not sure but i think that limits the ability to alter it.

I had that problem with FarCry..Couldnt get the damn cheats to work! :P

I never found out how to fix it. Sry