MSN messenger installation

Hi every one,

I am trying to install MSN instant messenger. I got to this web page from searching google.com:

http://get.live.com/wl/config_all

and clicked the "Install" button. Then the computer downloaded a file named "WLInstaller.exe" which I saved to the local disk. I tried to double click it to run it, but an error message says it "is not a valid Win32 application".

So apparently, I did something wrong. So back to step one: how do I get MSN messenger?

Note my operating system is Win 2K professional edition.