After installing Web Suite on a Windows OS with 64-bit version of ASP.NET, user receives "Service Unavailable" error when trying to access the application.
The cause for this error is that you cannot have both 32-bit and 64-bit version of ASP.NET installed on the same computer.
The solution to this problem is to convert .NET 2.0 Framework to 32-bit to allow it to work side-by-side with .NET Framework 1.1. Web Suite requires .NET Framework 1.1 to run.
To do this conversion, please read the following Microsoft knowledge base article:
How to switch between the 32-bit version of ASP.NET 1.1 and 64-bit version of ASP.NET 2.0 on a 64-bit version of Windows
http://support.microsoft.com/?id=894435
