I'm attempting to install Dynamics CRM 2011 on an AWS EC2 instance (Server 2008 R2 64 bit) When I run Microsoft.Crm.Server.Setup.exe from the Server\amd64 folder on the installation CD I get a message telling me the .exe is not a valid Win32 application. I've installed this on other x64 R2 servers with out problems.
Any thoughts gratefully received, I'm a bit stumped...