Microsoft .NET Framework 2.0 or greater is required for the AS2 module, Advanced Workflows Engine, and for the Secure Ad Hoc Transfer (SAT) module version 1.7.2 and earlier. SAT version 1.7.3 and later requires .NET Framework version 3.5.
If you do NOT have the .NET framework installed on your system, you can download and install it from the Microsoft Developer Network.
If you have the framework installed, but IIS still does not show any .NET-related information (such as the ASP.NET tab), run the ASP.NET IIS Registration Tool, found in the .NET installation folder (e.g., C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727 ). The file is called aspnet_regiis.exe and you must pass in a "-i" parameter.
To run the ASP.NET Registration Tool
At a command prompt, change to the directory that
contains the executable. For example, type
cd WINDOWS\Microsoft.NET\Framework\v2.0.50727
Type the following, then press ENTER:
aspnet_regiis.exe -i
ASP.NET is installed and registered.
For more information about the ASP.NET IIS Registration Tool (aspnet_regiis.exe), refer to
http://msdn2.microsoft.com/en-us/library/k6h9cz8h(VS.80).aspx.