Telerik.WebControls.GridInsertionObject error with property is an user class

[t800t8]

I found some information here http://www.telerik.com/community/forums/aspnet-ajax/grid/telerik-webcontrols-gridinsertionobject-error.aspx and here http://www.telerik.com/help/aspnet/grid/grderrormessages.html but they cannot help because my property is a class, not a primitive type.

My error message: 'Telerik.Web.UI.GridInsertionObject' does not contain a property with the name 'Address'.

Is there anyway to bind a data class in insert mode?

                                <FormTemplate>
                                    <table>
                                        <tr>
                                            <td>
                                                Street:
                                            </td>
                                            <td>
                                                <asp:TextBox ID="txtStreet" runat="server" Text='<%# Bind("Address.Street") %>' />
                                            </td>
                                            <td>
                                                City:
                                            </td>
                                            <td>
                                                <asp:TextBox ID="txtCity" runat="server" Text='<%# Bind("Address.City") %>' />
                                            </td>
                                            <td>
                                                Zip:
                                            </td>
                                            <td>
                                                <asp:TextBox ID="txtZip" runat="server" Text='<%# Bind("Address.Zip") %>' />
                                            </td>
                                            <td align="right">
                                                <asp:LinkButton ID="btnUpdate" runat="server" CommandName="Update" Visible='<%# Eval("Id").ToString().Length != 0  %>'>Update</asp:LinkButton>
                                                <asp:LinkButton ID="btnAdd" runat="server" CommandName="PerformInsert" Visible='<%# Eval("Id").ToString().Length == 0  %>'>Add</asp:LinkButton>
                                                &nbsp;&nbsp;&nbsp;
                                                <asp:LinkButton ID="btnCancel" runat="server" CommandName="Cancel">Cancel</asp:LinkButton>
                                            </td>
                                        </tr>
                                    </table>
                                </FormTemplate>

[t800t8]

Actually, it helps :-)

        protected void rgUsers_ItemCommand(object source, GridCommandEventArgs e)
        {
            if (e.CommandName == RadGrid.InitInsertCommandName && e.Item.OwnerTableView.Name.Equals("Contacts"))
            {
                e.Canceled = true;

                System.Collections.Specialized.ListDictionary newValues = new System.Collections.Specialized.ListDictionary();
                newValues["Address"] = new Address();

                e.Item.OwnerTableView.InsertItem(newValues);
            }
        }

[t800t8]

I still have a consideration. Why if I use a custom class, the problem happened but it didn't if I user primitive type?