i got one,but how can i know is it a 64bit?

bye the way what's .net server family?

You'll know its 64bit when it refuses to install on any standard Pentium or Athlon processor. Or just run the autoplay on the CD and see the autoplay menu that comes up, should be titled 64bit or something.

.NET Server Family consists of 4 server products:

Webserver

Standard Server

Enterprise Server (Advanced Server)

Datacenter Server

and its the server editions of Windows XP.

http://www.microsoft.com/windows.net/

do you know where can i got a 64bit version?

You said in your first post that you had it...?

Well, you can get it in the shops when its released as final. As it says in the forum rules we don't support warez on MSFN.

I have XP Pro 64 bit and the autorun wont even run on a 32 bit system. You could always read the docs on the cd.