Win2003 Srv. x64 Ed. not support SUS?

[graysummer]

Once I had SUS(Microsoft Software Update Service) SP1 on my own server. Now I have updated my server with Windows Server 2003 x64 Edition. But when I installed SUS SP1, the Windows said: U should install IIS5.0 or later, but I had already done it.

So I visit www.microsoft.com,they said : SUS support windows2000 server Sp4 or Windows server 2003 (except for all 64bit Version)

My problem is : now Microsoft had released Windows Software Update Service(WSUS).Does it not support Win2003 server x64 edition yet?

Thanks.