Setup cannot detect the required version of Visual Stdio .NET on this computer. Before you install this product, you must install a matching regional language version of Visual Studio .NET 2003,Visual Basic .NET 2003, or Visual C# .NET 2003.
Check out the registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\7.1\Setup\VS\BuildNumber\1033
If this key is not available the installation will not succeed.
Solution of this problem is to reinstall/repair the Visual Studio and get this key.