Nested Master Pages Page_Load

All,
Below is my problem. Any help is appreciated.
Two master pages - MasterPage1.Master and MasterPage2.Master
MasterPage1.Master has a panel repDisplayMessages and the Page_Load has the following        protected void Page_Load (object sender, EventArgs e)
       {
            if (!Page.IsPostBack)
            {
               repDisplayMessages.Visible = true;
            }
       }

MasterPage2.Master, Page_Load has the following        protected void Page_Load (object sender, Eve ...