Approval Setup Assignment Map column Show ID

Hi Team,

When i customize my own approval setup screen it is always showing ID number not text value of the number. It suppose to show map name. Attached my graph , dac and aspx

<%@ Page Language="C#" MasterPageFile="~/MasterPages/FormDetail.master" AutoEventWireup="true" ValidateRequest="false" CodeFile="YTPCAS01.aspx.cs" Inherits="Page_YTPCAS01" Title="Untitled Page" %>
<%@ MasterType VirtualPath="~/MasterPages/FormDetail.master" %>

<asp:Content ID="cont1" ContentPlaceHolderID="phDS" Runat="Server">
    <px:PXDataSource ID="ds" runat="server" Visible="True" Width="100%"
        TypeName="YTLProjectCode.ProjectCodeApprovalSetupMaint"
        PrimaryView="Setup"
        >
        <CallbackCommands>

        </CallbackCommands>
    </px:PXDataSource>
</asp:Content>
<asp:Content ID="cont2" ContentPlaceHolderID="phF" Runat="Server">
    <px:PXFormView ID="form" runat="server" DataSourceID="ds" DataMember="Setup" Width="100%" Height="100px" AllowAutoHide="false">
        <Template>
            <px:PXLayoutRule ID="PXLayoutRule1" runat="server" StartRow="True"></px:PXLayoutRule>
            <px:PXCheckBox runat="server" ID="CstPXCheckBox1" DataField="TimeRequestApproval" ></px:PXCheckBox></Template>
    </px:PXFormView>
</asp:Content>
<asp:Content ID="cont3" ContentPlaceHolderID="phG" Runat="Server">
    <px:PXGrid SyncPosition="True" ID="grid" runat="server" DataSourceID="ds" Width="100%" Height="150px" SkinID="Details" >
         <AutoSize Enabled="True" ></AutoSize>
                        <Levels>
                            <px:PXGridLevel DataMember="SetupApproval" >
                                <RowTemplate>
                                    <px:PXLayoutRule runat="server" StartColumn="True" LabelsWidth="M" ControlSize="XM" ></px:PXLayoutRule>
                                    <px:PXCheckBox ID="edIsActive" runat="server" DataField="IsActive" ></px:PXCheckBox>
                                    <px:PXSelector ID="edAssignmentMapID" runat="server" DataField="AssignmentMapID" AutoRefresh="True" ></px:PXSelector>
                                    <px:PXSelector ID="edAssignmentNotificationID" runat="server" DataField="AssignmentNotificationID" AutoRefresh="True" ></px:PXSelector>
                                </RowTemplate>
                                <Columns>
                                    <px:PXGridColumn DataField="IsActive" TextAlign="Center" Type="CheckBox"></px:PXGridColumn>
                                    <px:PXGridColumn DataField="AssignmentMapID" RenderEditorText="True" TextField="AssignmentMapID_EPAssignmentMap_Name"  ></px:PXGridColumn>
                                    <px:PXGridColumn DataField="AssignmentNotificationID" RenderEditorText="True" ></px:PXGridColumn>
                                </Columns>
                            </px:PXGridLevel>
                        </Levels>   
    </px:PXGrid>
</asp:Content>

Regards,

Sakthi