Installing my WPF application on XP machine shows error on startup. Please help.

Question

HI,Please ANSWER ME.

My WPF application is running fine on Windows 7. Installation on XP machine brings up the following error on startup:
Framework Version: v4.0.30319

Description: The process was terminated due to an unhandled exception.
Exception Info: System.Windows.Markup.XamlParseException
Stack: at System.Windows.Markup.XamlReader.RewrapException(System.Exception, System.Xaml.IXamlLineInfo, System.Uri)
at System.Windows.Markup.WpfXamlLoader.Load(System.Xaml.XamlReader, System.Xaml.IXamlObjectWriterFactory, Boolean, System.Object, System.Xaml.XamlObjectWriterSettings, System.Uri)
at System.Windows.Markup.WpfXamlLoader.LoadBaml(System.Xaml.XamlReader, Boolean, System.Object, System.Xaml.Permissions.XamlAccessLevel, System.Uri)
at System.Windows.Markup.XamlReader.LoadBaml(System.IO.Stream, System.Windows.Markup.ParserContext, System.Object, Boolean)
at System.Windows.Application.LoadComponent(System.Object, System.Uri)
at MyApplication.App.InitializeComponent()
at MyApplication.App.Main()