Greetings

I've developed a C# application and created a setup project to
distribute it. On my machine and machines like mine (machines with
Windows 2000 Pro) the setup package works fine, i.e., the application
installs and I can run and use it.
But my customer tries to execute the same setup package on his computer
(a Windows XP computer with some years) and he gets the following error:

«
This installation package could not be opened. Verify that the package
exists and that you can access it, or contact the application vendor to
verify that this is a valid Windows Installer package.
»

For my setup package I use a silent bootstrapper, so .NET Framework is
installed on background. When .NET Framework finishes install, my
application should install, but the error occurs.

Any ideas about this error? Can anything be wrong on the settings.ini
file? My bootstrapper's settings.ini file is

[Bootstrap]
Msi=Application.msi
ProductName=Application
FxInstallerPath=dotnet/

TIA

Almeida