Before you set up the reference application, make sure you have enabled the 64-bit version of ASP.NET.
The ASP.NET reference implementation supports versions 2.0 SP1, 3.0, and 3.5 of ASP.NET.
To install the 64-bit version of ASP.NET:
From a command prompt, issue the following command to disable 32-bit mode:
cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 0
Issue the following command to install the 64-bit version of ASP.NET 2.0 and to install the script maps at the IIS root:
%SYSTEMROOT%\Microsoft.NET\Framework64\v2.0.50727\aspnet_regiis.exe -i
The .NET DLLs packaged with this release are compiled using the 64-bit version of the .NET Framework. They should be compatible with .NET Frameworks 2.0 SP1, 3.0, and 3.5.