Hi, please help. I have changed all files to run as admin so is not that problem, but when i go into fsx and go to add ons menu, as soon as I click on squawk box fsx freezes. The sound of the engine running remains but is completely frozen. I ctrl, alt, del and task bar says fsx not responding. Any help please?

Try running Squawkbox externally. Run it from the start menu, outside of FSX. If you are running Windows 7 or up make sure your are running it as an administrator.

I can say that I had use the same method, it work only externally, so only on windowed mode.