Inserting a listitem inside a subfolder in a sharepoint list using SharePoint Default Webservice.

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;
using MySite_Dat;
using Microsoft.SharePoint;
public partial class Default17 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}

protected void btnSave_Click(object sender, EventArgs e)
{
string strInsertCommand = string.Empty;
string strSelectedFolder = string.Empty;
string strListName = "MyList";
strSelectedFolder = "http://vlnrm:100/Sample/Lists/MyList/TestFolder2/" + DropDownList1.SelectedItem.Value;
strInsertCommand = "" + txtTitle.Text + "";
MySite_Dat.Lists objLogin = new MySite_Dat.Lists();
objLogin.UseDefaultCredentials=true;
objLogin.Url = "http://http://vlnrm:100/Sample/_vti_bin/Lists.asmx";
XmlDocument xmlDoc = new System.Xml.XmlDocument();
System.Xml.XmlElement elBatch = xmlDoc.CreateElement("Batch");
elBatch.SetAttribute("RootFolder", strSelectedFolder);
elBatch.SetAttribute("OnError", "Continue");
elBatch.SetAttribute("ListVersion", "1");
elBatch.InnerXml = strInsertCommand;
try
{
XmlNode ndReturn = objLogin.UpdateListItems(strListName, elBatch);
string result = ndReturn.OuterXml.ToString();
}
catch (Exception ex)
{
this.Controls.Add(new LiteralControl(ex.ToString()));
}
txtTitle.Text = "";
}
}