Insert Error: Column name or number of supplied values does not match table definition.

i'm getting following error:

Insert Error: Column name or number of supplied values does not match table definition.


Total column in excel is = 17
Total field in table = 17 + 3 = 20
among 3 fiedls 1 is (primarykeyid-autogenerate) 2 is (will get from another textbox) and 3 is (defaulvalue 1)

i don't know how to pass text box value and default value to procedure.

Please suggest me a way

Here is my stored procedure code

USE [Demo]
GO
/****** Object:  StoredProcedure [dbo].[spx_ImportFromExcel07]    Script Date: 03/21/2014 18:25:49 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[spx_ImportFromExcel07]
   @SheetName varchar(20),
   @FilePath varchar(300),
   @HDR varchar(3),
   @TableName varchar(50)
AS
BEGIN
    DECLARE @SQL nvarchar(1000)
    IF OBJECT_ID (@TableName,'U') IS NOT NULL

      SET @SQL = 'INSERT INTO ' + @TableName + ' SELECT * FROM OPENDATASOURCE'

    ELSE

      SET @SQL = 'SELECT * INTO ' + @TableName + ' FROM OPENDATASOURCE'

 
    SET @SQL = @SQL + '(''Microsoft.ACE.OLEDB.12.0'',''Data Source='
    SET @SQL = @SQL + @FilePath + ';Extended Properties=''''Excel 12.0;HDR='
    SET @SQL = @SQL + @HDR + ''''''')...['
    SET @SQL = @SQL + @SheetName + ']'
    EXEC sp_executesql @SQL

END

protected void btnSave_Click(object sender, EventArgs e)
       {
           string FileName = lblFileName.Text;
           string Extension = Path.GetExtension(FileName);
           string FolderPath = Server.MapPath(ConfigurationManager.AppSettings["FolderPath"]);
           string CommandText = "";
           switch (Extension)
           {
               case ".xls": //Excel 97-03
                   CommandText = "spx_ImportFromExcel03";
                   break;
               case ".xlsx": //Excel 07
                   CommandText = "spx_ImportFromExcel07";
                   break;
           }
           //insertDB();
           String strConnString = ConfigurationManager.ConnectionStrings["CARGONETConnectionString"].ConnectionString;
           SqlConnection con = new SqlConnection(strConnString);
           SqlCommand cmd = new SqlCommand();
           cmd.CommandType = CommandType.StoredProcedure;
           cmd.CommandText = CommandText;
           cmd.Parameters.Add("@SheetName", SqlDbType.VarChar).Value = ddlSheets.SelectedItem.Text;
           cmd.Parameters.Add("@FilePath", SqlDbType.VarChar).Value = FolderPath + FileName;
           cmd.Parameters.Add("@HDR", SqlDbType.VarChar).Value = rbHDR.SelectedItem.Text;
           cmd.Parameters.Add("@TableName", SqlDbType.VarChar).Value = "TB_TransAgentSeaFreightRate";
           cmd.Connection = con;
           try
           {
               con.Open();
               object count = cmd.ExecuteNonQuery();
               lblMessage.ForeColor = System.Drawing.Color.Green;
               lblMessage.Text = count.ToString() + " records inserted.";
           }

           catch (Exception ex)
           {

               lblMessage.ForeColor = System.Drawing.Color.White;
               lblMessage.Text = ex.Message;

           }

           finally
           {

               con.Close();
               con.Dispose();
               Panel1.Visible = true;
               //Panel2.Visible = false;
               dg_AgentSFR.Visible = true;
           }

       }