Getting integrity error when I run installer

[Palidius]

Whenever I run the installer for Fall from Heaven, I am getting an error that says:

"Installer integrity check has failed. Common causes include incomplete download and damaged media. Contact the installer's author to obtain a new copy.

More Information at:
http://nsis.sf.net/NSIS_Error"

I have tried both the file from Filefront and moddb.com and both give the same message. I am running Vista, have BTS version 3.17 and I running the installer from the C:\Program Files\Firaxis Games\Sid Meier's Civilization 4\Beyond the Sword\Mods folder. I downloaded the files today(6/14/09). Am I doing something wrong? Would my AV software being interfering with the download? I doubt both sites have gotten hacked and trojaned installers put there instead.

Any help would be appreciated since I deleted my previous files for FFH and I am unable to play it at all.

 

[Emptiness]

On the web site mentioned in the error message (http://nsis.sourceforge.net/NSIS_Error) there are 10 steps given to try to correct the problem. They are under How do I fix the problem?, in the If the software was obtained from the Internet section. One of the suggestions is to try downloading the file from another source, which you have tried. Have you attempted the other nine potential resolutions?