Problem so spojenim SQL a C++

#include "stdafx.h"

#using <mscorlib.dll>
#using <System.dll>
#using <System.Data.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Data;
using namespace System::Data::SqlClient;

#ifdef _UNICODE
int wmain(void)
#else
int main(void)
#endif
{
        SqlConnection *cn = new SqlConnection();
        DataSet *CustomersDataSet = new DataSet();
        SqlDataAdapter *da;
        SqlCommandBuilder *cmdBuilder;
 
        //Set the connection string of the SqlConnection object to connect
        //to the SQL Server database in which you created the sample
        //table in Section 1.0
        cn->ConnectionString =  "Server=server;Database=northwind;UID=login;PWD=password;";

        cn->Open();     

        //Initialize the SqlDataAdapter object by specifying a Select command
        //that retrieves data from the sample table
        da = new SqlDataAdapter("select * from CustTest order by CustId", cn);

        //Initialize the SqlCommandBuilder object to automatically generate and initialize
        //the UpdateCommand, InsertCommand and DeleteCommand properties of the SqlDataAdapter
        cmdBuilder = new SqlCommandBuilder(da);

        //Populate the DataSet by executing the Fill method of the SqlDataAdapter
        da->Fill(CustomersDataSet, "Customers");

        //Display the Update, Insert and Delete commands that were automatically generated
        //by the SqlCommandBuilder object
   Console::WriteLine("Update command Generated by the Command Builder : ");
   Console::WriteLine("==================================================");
   Console::WriteLine(cmdBuilder->GetUpdateCommand()->CommandText);
   Console::WriteLine("         ");

   Console::WriteLine("Insert command Generated by the Command Builder : ");
   Console::WriteLine("==================================================");
   Console::WriteLine(cmdBuilder->GetInsertCommand()->CommandText);
   Console::WriteLine("         ");       

   Console::WriteLine("Delete command Generated by the Command Builder : ");
   Console::WriteLine("==================================================");
   Console::WriteLine(cmdBuilder->GetDeleteCommand()->CommandText);
   Console::WriteLine("         ");

        //Write out the value in the CustName field before updating the data using the DataSet
   DataRow *rowCust = CustomersDataSet->Tables->Item["Customers"]->Rows->Item[0];
   Console::WriteLine("Customer Name before Update : {0} ", rowCust->Item["CustName"]);
      
        //Modify the value of the CustName field
   String *newStrVal = new String("Jack"); 
        rowCust->set_Item("CustName", newStrVal);

        //Modify the value of the CustName field again
        String *newStrVal2 = new String("Jack2"); 
        rowCust->set_Item("CustName", newStrVal2);

        //Post the data modification to the database
        da->Update(CustomersDataSet, "Customers");       

        Console::WriteLine("Customer Name after Update : {0} ", rowCust->Item["CustName"]);


        //Close the database connection
        cn->Close();

        //Pause
   Console::ReadLine();
       
      return 0;
}