[CMake] Win64

[Surya Kiran Gullapalli]

Hello,
I'm running cmake - 2.4.8 on win64 platform. Cmake was installed using
the win32 installer.

Now when i'm running cmake and doing some platform checks, I'm always
getting the platform as x86 only.

Like
CMAKE_CL_64 is not defined.
ENV{PROCESSOR_ARCHITECTURE} is x86.

Even though at command prompt it shows as AMD64.

Do i need to install 64 bit cmake to make these things work? if so how?
Do i need to compile from source?

Thanks in advance,
Surya