error in calling jquery function on datalist button click

i have a datalist to display the details of  item  from table "PRODUCTS"  of my database,  in  datalist has  link button .. on click on linkbutton i want to store the values  (name & price )  of that row in the another table "ORDERS ".  I   am using jquery -ajax method for it .. but on button click  the code work fine and values inserted in table "Orders" without any postback , but its happens only once  i;e when i click again nothing happens, no values inserted , neither show any error.  suggest me some solution or  right code to do it .

<asp:DataList ID="DataList1" RepeatColumns="4" RepeatLayout="table"
                        RepeatDirection="horizontal" runat="server"  >
  
     
   <ItemTemplate>

  <table class="item_wrap" id="tbl"  >
<tr style=" height:60px">
<td  align="center" >
<asp:Image ID="sh1" Height="120px" Width="120px" runat ="server"
ImageUrl='<%#Eval("produrl")%>'  CssClass="item_pic"  />
</td>
</tr>
                 <tr  style="height:15px; padding-left:20px">
 <td >
 <asp:Label ID="l1" runat="server"  Text='<%#Eval("prodname")%>' Height="25px" CssClass="item_title"  ></asp:Label>
 </td>
                </tr>
                <tr style=" height:15px">
                <td style="color:#fa7a0a" >
    </asp:Label><asp:Label ID="l2" runat="server"  Text='<%#Eval("Aprice")%>'  CssClass="apirce" >
   </asp:Label>
  </td>
 <td >
 <asp:Label ID="l3" runat="server" Text='<%#Eval("productid")%>' Visible="False"></asp:Label>
</td>
   
                 </tr>
                 <tr style="height:30px; padding-left:15px">
                 <td>
                
                    />
                     <asp:LinkButton ID="LinkButton2" runat="server"
                     CssClass="ImageButton1" Height="20px" Width="90px"></asp:LinkButton>
                 </td>
                 </tr>
 
</table>

                 </ItemTemplate>
            
                <FooterTemplate>
                
                </FooterTemplate>
                </asp:DataList>

<script type="text/javascript">
      $(document).ready(function() {
          $("[id*=LinkButton2]").click( function() {
              var price = $("[id*=l2]", $(this).closest(".item_wrap")).html();
              var name = $("[id*=l1]", $(this).closest(".item_wrap")).html();
              var pageUrl = '<%=ResolveUrl("Default.aspx")%>'


              $.ajax({
                  type: "POST",
                  url: pageUrl + "/DisplayMessage",
                  data: "{'name':'" + name + "','price':'" + price + "'}",
                  contentType: "application/json; charset=utf-8",
                  dataType: "json",
                 success: OnSuccessCall,
            error: OnErrorCall
        });
 
    
 
    function OnSuccessCall(response) {
    }
 
    function OnErrorCall(response) {
        alert(response.status + " " + response.statusText);
    }

          });
      });
    </script>

default.aspx.cs


 [WebMethod]
    public static string DisplayMessage(string name, string price)
    {

        SqlConnection conn = new SqlConnection(WebConfigurationManager.ConnectionStrings["eshopConnectionString"].ConnectionString);
        //Creating Delay""
        conn.Open();
        string sql = string.Format(@"INSERT INTO [eshop].[dbo].[orders]
([name]
,[price])
VALUES
('{0}'
,'{1}')", name, price); SqlCommand cmd = new SqlCommand();
        cmd.Connection = conn;
        cmd.CommandText = sql;
        cmd.CommandType = CommandType.Text;

        cmd.ExecuteNonQuery();
        conn.Close();
        return " success";
    
    
    }