While have send SMS i have gettin mention error.

Server Error in '/' Application.

Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. Compiler Error Message: CS1501: No overload for method 'sendSMS' takes 2 arguments Source Error:

Line 236:                           
Line 237:                            
Line 238:    sendSMS(mob_nm.Trim(), "Monthly bill for the mobile number " + mob_nm + " currently used by " + lctn + " has been generated for date " + frm_dt + " to " + to_dt + " date . kindly verify the bill in MUNPL intranet  " );
Line 239:    dt.Clear();
Line 240:    dt.Dispose();

Source File: c:\Users\Administrator\Documents\Visual Studio 2012\Projects\Mobile_detals\Mob_del_dtls\Mob_del_dtls\admn.aspx.cs    Line: 23

namespace WebApplication13
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
           //string message = "$#%^&*()?/|";
           // Response.Write(sendSMS("+919999999999", Uri.EscapeDataString(message)));
            
            if (Session["FirstName"] == null)
                Response.Redirect("login1.aspx");
            else
            {
                String EmplooyeId = Convert.ToString((int)Session["empid"]);
                String FirstName = Session["FirstName"].ToString();
                String LastName = Session["LastName"].ToString();
                String Department = Session["Department"].ToString();

                lbluserInfo.Text = "Department:- " + Department + ".";

                Label1.Text = "Welcome Mr." + FirstName + " " + LastName + " ";
            }
           
            if (!this.IsPostBack)
            {
                this.BindGrid();
            }

        }  

        private void BindGrid()
        {
            string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
            using (SqlConnection con = new SqlConnection(constr))
            {
                using (SqlCommand cmd = new SqlCommand("SELECT Id, VEND_EMP, VEN_EMP_NAME, REF_NO, PARTICULARS, AMT,VEN_EMP_PHNO, VEN_EMP_EMAIL,EIC_PH_NO,EIC_MAIL_ID FROM MESSAGE_SYSTEM where flag  <> 'Y'"))
                {
                    using (SqlDataAdapter sda = new SqlDataAdapter())
                    {
                        cmd.Connection = con;
                        sda.SelectCommand = cmd;
                        using (DataTable dt = new DataTable())
                        {
                            sda.Fill(dt);
                            GridView1.DataSource = dt;
                            GridView1.DataBind();
                        }
                    }
                }
            }
        }

        protected void btnSendMail_Click(object sender, EventArgs e)
        {
            string Id = string.Empty;
            DataTable dt = new DataTable();
            try
            {
                foreach (GridViewRow row in GridView1.Rows)
                {
                    //get Current EMAIL_ID from the DataKey
                    Id = Convert.ToString(GridView1.DataKeys[row.RowIndex].Value);
                    CheckBox cb = (CheckBox)row.FindControl("chkSelect");
                    string flag = cb.Checked ? "Y" : "N";
                    string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
                    using (SqlConnection con = new SqlConnection(constr))
                    {
                        SqlCommand cmd = new SqlCommand("UPDATE MESSAGE_SYSTEM SET flag = @flag where Id=@Id");
                        cmd.Connection = con;
                        cmd.Parameters.AddWithValue("@flag", flag);
                        cmd.Parameters.AddWithValue("@Id", Id);
                        con.Open();
                        string isUpdated = Convert.ToString(cmd.ExecuteNonQuery());
                        con.Close();
                    }
                    if (cb.Checked)
                    {
                        using (SqlConnection con = new SqlConnection(constr))
                        {
                            SqlCommand cmd = new SqlCommand("select VEN_EMP_EMAIL,EIC_MAIL_ID, PARTICULARS, REF_NO,AMT, VEN_EMP_PHNO, EIC_PH_NO from MESSAGE_SYSTEM where Id=@Id", con);
                            cmd.Parameters.AddWithValue("@Id", Id);
                            SqlDataAdapter adp = new SqlDataAdapter(cmd);
                            //Fill datatable with EMAIL_ID corresponding to Current EMP_ID
                            adp.Fill(dt);
                            //Get EMAIL_ID into variable
                            string emailId = dt.Rows[0]["VEN_EMP_EMAIL"].ToString();
                            string emailId1 = dt.Rows[0]["EIC_MAIL_ID"].ToString();
                            string PARTICULARS = dt.Rows[0]["PARTICULARS"].ToString();
                            string AMT = dt.Rows[0]["AMT"].ToString();

                            string REF_NO = dt.Rows[0]["REF_NO"].ToString();
                            string[] num = REF_NO.Split('&').Select(n => (n.Trim())).ToArray();
                            string phoneNo = dt.Rows[0]["VEN_EMP_PHNO"].ToString();
                            string phoneNo1 = dt.Rows[0]["EIC_PH_NO"].ToString();
                            //write code to send mail
                            // string message = "$#%^&*()?/|";

                            SendEmailUsingGmail(emailId, PARTICULARS, AMT, REF_NO);
                            SendEmailUsingGmail(emailId1, PARTICULARS, AMT, REF_NO);

                            sendSMS(phoneNo.Trim(), "Amount of Rs " + AMT + " for " + PARTICULARS + "  is sent to your Bank account against  " + REF_NO + "  ");
                            sendSMS(phoneNo1.Trim(), "Amount of Rs " + AMT + " for " + PARTICULARS + " is sent to your Bank account against " + REF_NO + "  ");
                            dt.Clear();
                            dt.Dispose();
                        }
                    }
                }
                // ScriptManager.RegisterClientScriptBlock(Page, Page.GetType(), Guid.NewGuid().ToString(), "alert('Payment Details Sent Successfully');", true);
            }
            catch (Exception ex)
            {
                Response.Write("Error occured: " + ex.Message.ToString());
            }
            finally
            {
                Id = string.Empty;
            }

            System.Threading.Thread.Sleep(5000);
        }

        static string sendSMS(string mobileNo, string messageTxt)
        {
             string SMSurl = "http://185.255.8.59/sms/1/text/query?username=NTpc&password=NTpc@321&to=" + mobileNo + "&text=" + messageTxt + " &from=MUNPLA & indiaDltContentTemplateId=@templateid&indiaDltPrincipalEntityId=1201159222154902387";
             //string SMSurl = "https://82r89.api.infobip.com/sms/1/text/query?username=MUNPLA&password=Ashwini@085531&to=" + mobileNo + "&text=" + messageTxt + "&from=MUNPLA";
             // string SMSurl = "http://smsdone.com/login/?callback=http%3A%2F%2Fsmsdone.com%2Fsettings%2Froundabout%3F?username=ntpc&password=NTpc@321&to=" + mobileNo + "&text=" + messageTxt + "&from=MUNPLA";
             HttpWebRequest request = (HttpWebRequest)WebRequest.Create(SMSurl);
             HttpWebResponse response = (HttpWebResponse)request.GetResponse();
             StreamReader sr = new StreamReader(response.GetResponseStream());
             return sr.ReadToEnd();               
        }
    }
}