What's wrong in modal popup (bootstarp)

Question

Greeting

I designed a page containe detailsview and grideview, I play with show mood, a detailsview in (modal popup) conatier, when a user clich on (Add product) a modal popup woking correctly.

 Here a modal popup code for details view control in my work

<script type="text/javascript">
        function ShowPopup(title, body) {
            $("#PopupCat .modal-title").html(title);
            $("#PopupCat .modal-body").html(body);
            $("#PopupCat").modal("show");
        }

 

<div class="modal fade" id="myModal" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
div class="modal-dialog">
<div class="modal-content">
    <div class="modal-header">
        <table style="width:100%">
            <tr>
                <td style="text-align:left">
        <h4 class="modal-title" style="text-decoration:wavy; color:#006699">Add Category</h4>
                </td>
                <td style="text-align:right">
                    <button type="button" class="close" data-dismiss="modal" aria-hidden="true" style="color:red">×</button>
                </td>
            </tr>
        </table>

    </div>
    <div class="modal-body" style="padding-left: 0px;padding-right:0px">
      <div class="col-lg-12" style="padding-left: 10px;padding-right:0px">

sp:DetailsView ID="DV_ADDCAT" runat="server" AutoGenerateRows="False" DefaultMode="Insert" OnItemCommand="DV_ADDCAT_ItemCommand" OnModeChanging="DV_ADDCAT_ModeChanging">
    <Fields>
        <asp:TemplateField HeaderText="Cat.Code">
            <EditItemTemplate>
                <asp:TextBox ID="Tb_CatCodeId" runat="server" Text=""></asp:TextBox>
            </EditItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Name" SortExpression="Name">
            <EditItemTemplate>

            </EditItemTemplate>
            <InsertItemTemplate>
                <asp:TextBox ID="TB_CatName_I" runat="server" Text="" ></asp:TextBox>
            </InsertItemTemplate>
            <ItemTemplate>

            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Description" SortExpression="Description">
            <EditItemTemplate>

            </EditItemTemplate>
            <InsertItemTemplate>
                <asp:TextBox ID="TB_CDESC_I" runat="server" Text="" TextMode="MultiLine"></asp:TextBox>
            </InsertItemTemplate>
            <ItemTemplate>

            </ItemTemplate>
        </asp:TemplateField>

        <asp:TemplateField>
            <InsertItemTemplate>
               <div style="text-align:center">
            <asp:Button ID="Button1" runat="server" Text="Add"  CommandName="AddNew" CssClass="btn btn-outline-success" />
                <asp:Button ID="Button2" runat="server" Text="Cancel" CommandName="Cancel" CssClass="btn btn-outline-dark"/>
               </div>
                   </InsertItemTemplate>
        </asp:TemplateField>
    </Fields>
</asp:DetailsView>
          </div>
    </div>
  </div>
</div>
    </div>

 In a same way I play on delete row from grideview message, (when a user delete record) a modal popup show message like this photo which work correctly in another page

 

 

 But this method not working correctly in a page which i work on it which conatin another modal popup which conatine (deatils view control)

 here a code for delete row in Grideview which should show a modal popup message, notice a delete row working correctly no problem with that, my problem a popup message not working correctly

<script type="text/javascript">
/for detailsview
       function ShowPopup(title, body) {
           $("#PopupCat .modal-title").html(title);
           $("#PopupCat .modal-body").html(body);
           $("#PopupCat").modal("show");
       }

/for gridview
       function ShowPopupDcat(title, body) {
           $("#PopupCat .modal-title1").html(title);
           $("#PopupCat .modal-body1").html(body);
           $("#PopupCat").modal("show");
       }
lt;/script>

event callback a modal popup in c# (Gridview RowCommand)

if (e.CommandName == "Delete")
                {
                    Label Lb_Ccode = (Label)GV_Category.Rows[rowidcat].FindControl("Lb_CoId_I");
                    Label Lb_Cname = (Label)GV_Category.Rows[rowidcat].FindControl("Lb_CatName");
                    Label Lb_imgCnm = (Label)GV_Category.Rows[rowidcat].FindControl("Lb_PhoName_I");
                    DelFromCatFolder(Lb_imgCnm.Text);
                    lbdcatinfo.Text = "Category Row" + " " + "[[" + Lb_Ccode.Text + "]]" + " " + "[[" + Lb_Cname.Text + "]]" + "deleted from Data Base";
                    imgdel.ImageUrl = "~/images/Forbidden_area/row_del.png";
                    ClientScript.RegisterStartupScript(this.GetType(), "Popup", "ShowPopupDcat();", true);
                }

 Soooooooooooooo what's wrong in my work? Is this method wrong completly or I can't able to call two modal pop up in differnt ways.

many thanks