Adding link to another screen using Special = AllowEdit not working

I have created a screen showing records on grid, I have also created a redirection to invoices and memos screen which is working perfectly from web. 
however from my acuamtica application it is not working.

see below

 

Acumatica ASPX
 

<%@ Page Language="C#" MasterPageFile="~/MasterPages/FormDetail.master" AutoEventWireup="true" ValidateRequest="false" CodeFile="SO302110.aspx.cs" Inherits="Page_SO302110" 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="GDLOrderCustomization.DeliveryMasterMaint"
        PrimaryView="deliveryMaster"
        >
    <CallbackCommands>

    </CallbackCommands>
  </px:PXDataSource>
</asp:Content>
<asp:Content ID="cont2" ContentPlaceHolderID="phF" Runat="Server">
  <px:PXFormView ID="form" runat="server" DataSourceID="ds" DataMember="deliveryMaster" Width="100%" Height="100px" AllowAutoHide="false">
    <Template>
      <px:PXLayoutRule ID="PXLayoutRule1" runat="server" StartRow="True"></px:PXLayoutRule>
      <px:PXLayoutRule runat="server" ID="CstPXLayoutRule5" StartColumn="True" ></px:PXLayoutRule>
      <px:PXSelector runat="server" ID="CstPXSelector2" DataField="DeliveryID" ></px:PXSelector>
      <px:PXSelector runat="server" ID="CstPXSelector1" DataField="AssetID" CommitChanges="True" ></px:PXSelector>
      <px:PXLayoutRule runat="server" ID="CstPXLayoutRule6" StartColumn="True" ></px:PXLayoutRule>
      <px:PXSelector AutoRefresh="True" runat="server" ID="CstPXSelector7" DataField="MpesaTillId" ></px:PXSelector>
      <px:PXSelector runat="server" ID="CstPXSelector3" DataField="DriverID" ></px:PXSelector>
      <px:PXSelector runat="server" ID="CstPXSelector4" DataField="RouteID" ></px:PXSelector></Template>
  </px:PXFormView>
</asp:Content>
<asp:Content ID="cont3" ContentPlaceHolderID="phG" Runat="Server">
  <px:PXGrid Caption="Invoices" ID="grid" runat="server" DataSourceID="ds" Width="100%" Height="150px" SkinID="Details" AllowAutoHide="false">
    <Levels>
      <px:PXGridLevel DataMember="deliveryInvoices">
          <Columns>
        <px:PXGridColumn LinkCommand="ViewInvoice" DataField="RefNbr" Width="140" ></px:PXGridColumn>
        <px:PXGridColumn DataField="CustomerID_Customer_acctName" Width="280" ></px:PXGridColumn>
        <px:PXGridColumn DataField="CuryGoodsTotal" Width="100" ></px:PXGridColumn>
        <px:PXGridColumn DataField="GDLShipmentConfirmation__ShipmentConfrmId" Width="140" ></px:PXGridColumn></Columns>
      </px:PXGridLevel>
    </Levels>
    <AutoSize Container="Window" Enabled="True" MinHeight="150" ></AutoSize>
    <ActionBar >
    </ActionBar>
  </px:PXGrid>
</asp:Content>

Mobile app code

 

add screen SO302110 {



    add container "DeliveryMaster" {



  add layout "SelectRow" {
 displayName ="SelectRow"
    add field "DeliveryID"
    add field "DriverID"
 layout = "Inline"
    }

}


      add container "Invoices" {
    fieldsToShow = 2   


 add field "CustomerName"{
special = AllowEdit

      listPriority = 98
    }

         add field "ReferenceNbr"{
 special = AllowEdit
 forceIsVisible = True
    }

}

      }

Please assist,

Any kind of response will be highly appreciated.