Why is my Uninstall method not being called?

Question

My VS 2008 created installer doesn't call the override Uninstall method in my installer class. why? The Install method was called. My installer class looks like this:

[RunInstaller(true)]
    public partial class InstallerClass : Installer
    {
        public InstallerClass()
        {
            InitializeComponent();
        }
        public override void Install(IDictionary stateSaver)
        {
            base.Install(stateSaver);

            //encrypt connection string
            encryptConntStr();

            //create database
            createDatabase();
        }

        public override void Commit(IDictionary savedState)
        {
            base.Commit(savedState);
        }

        public override void Rollback(IDictionary savedState)
        {
            base.Rollback(savedState);
        } 

        public override void Uninstall(IDictionary savedState)
        {
            base.Uninstall(savedState);
            System.Diagnostics.Debugger.Break();
            MessageBox.Show("I am in Uninstall now.");
            string exePathStr = Context.Parameters["targetdir"];
           ...           

        }
}

EDIT:

Answer 1

make sure the CustomActionData property is not empty. Some how it was empty in my case and cause that problem.