importing data from excel to a atble in the database

Hi. am writing a code to import data from excel to a table in the database but am getting the following errror;

"Format of the initialization string does not conform to specification starting at index 89"

below is my code behind and the webconfig respectively;

using System;
using System.Data;
using System.IO;
using System.Data.OleDb;
using System.Configuration;
using System.Data.SqlClient;



public partial class Smarttable : System.Web.UI.Page
{
OleDbConnection Econ;
SqlConnection con;

string constr, Query, sqlconn;
protected void Page_Load(object sender, EventArgs e)
{

}


private void ExcelConn(string FilePath)
{

constr = string.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\Users\\DAKTARI\\Desktop\\smarttable.xls;Extended Properties=''Excel 12.0 Xml;HDR=YES;''", FilePath);
Econ = new OleDbConnection(constr);

}
private void connection()
{
sqlconn = ConfigurationManager.ConnectionStrings["SqlCom"].ConnectionString;
con = new SqlConnection(sqlconn);

}


private void InsertExcelRecords(string FilePath)
{
ExcelConn(FilePath);

Query = "SELECT [InvoiceNumber],[AmountPaid],[Remarks] FROM [Orders$]";
OleDbCommand Ecom = new OleDbCommand(Query, Econ);
Econ.Open();

DataSet ds = new DataSet();
OleDbDataAdapter oda = new OleDbDataAdapter(Query, Econ);
Econ.Close();
oda.Fill(ds);
DataTable Exceldt = ds.Tables[0];
connection();
SqlBulkCopy objbulk = new SqlBulkCopy(con);
objbulk.DestinationTableName = "smarttable";
objbulk.ColumnMappings.Add("InvoiceNumber", "InvoiceNumber");
objbulk.ColumnMappings.Add("AmountPaid", "AmountPaid");
objbulk.ColumnMappings.Add("Remarks", "Remarks");
con.Open();
objbulk.WriteToServer(Exceldt);
con.Close();

}
protected void Button1_Click(object sender, EventArgs e)
{
string CurrentFilePath = Path.GetFullPath(FileUpload1.PostedFile.FileName);
InsertExcelRecords(CurrentFilePath);
}
}

......kindly assist