elliot

Hello everybody, I have a PC who has a 64 bit CPU. I downloaded the windows server 2008 32 bit version. Now i want to install exchange server 2007 which only works on a 64 bit platform. Is there any software or an upgrade package that i can download from somewhere in order to upgrade my 32 bit server to a 64 bit server ?? Any help would be hugely appreciated. Thanks a lot. Elliot Antoine Nehme