TweakUIPowerto Is not a valid Win32 application.

I am looking out for help in installation of new software. Let me give you my PC details. I have Windows XP SP 3 as my operating system.
I am trying to install TweakUI Power Toy on my Windows XP machine. I got a download package from one of my friend who has successfully installed it on his machine.
Now when I try to install it from the same package, it throws an error message:
C:utilitiesTweakUIPowertoySetup_ia64.exe
C:utilitiesTweakUIPowertoySetup_ia64.exe is not a valid Win32 application.
Am I doing some mistake?
