Sql Database Connectivity Error

Hi All, 

I am a beginner in ASP.NET and trying to access sql database from using C# language thru ASP.NET .  I hv tried with below code but could not able to make out. connection = new SqlConnection("Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=Northwind;Data Source=ServerName;");

connection.Open();

dataadapter = new SqlDataAdapter("select * from customers", connection);dataset = new DataSet();

dataadapter.Fill(dataset, "table1");

DataGrid1.DataSource = dataset;

DataGrid1.DataMember = "table1";

 

Am getting the error -

System.Data.SqlClient.SqlException: Login failed for user 'ServerNameASPNET'.

 Please help.