ObjectDataSource's Select method not calling

<asp:GridView runat="server" ID="grdMine" DataSourceID="srcMyParents" DataKeyNames="ID" SortedAscendingCellStyle-BackColor="Wheat" SortedDescendingCellStyle-BackColor="WhiteSmoke" OnRowDataBound="grdMine_RowDataBound"> <Columns> <asp:BoundField DataField="FirstName" HeaderText="First Name" NullDisplayText="N/A" ReadOnly="true" ShowHeader="true" SortExpression="FirstName" /> <asp:BoundField DataField="LastName" HeaderText="Last Name" NullDisplayText="N/A" ReadOnly="true" ShowHeader="true" SortExpression="LastName" /> <asp:BoundField DataField="BirthDate" HeaderText="Birth Date" NullDisplayText="N/A" ReadO ...