I am trying to develop in my pc this basic 3 tier solution out of these links

http://www.15seconds.com/issue/051117.htm

and

http://www.15seconds.com/issue/051123.htm



I have problems because the dataset in one part is OrdersDataSet.xsd, as said in the link ,but some lines bellow in the code show me this lines:

Imports ta = NorthwindDataSetTableAdapters
Partial Public Class NorthwindDataSet

 Private taOrders As New ta.OrdersTableAdapter
 Private taOrderDetail As New ta.Order_DetailsTableAdapter
 Private taCustomer As New ta.CustomersTableAdapter
 Private taEmployee As New ta.EmployeesTableAdapter
 Private taProduct As New ta.ProductsTableAdapter

 Public Sub FillDataSetAll()
  Me.taOrders.Fill(Me.Orders)
  Me.taOrderDetail.Fill(Me.Order_Details)
  Me.taCustomer.Fill(Me.Customers)
  Me.taEmployee.Fill(Me.Employees)
  Me.taProduct.Fill(Me.Products)
 End Sub

when i put this in the code it tells me an error message simmilar to this
the namespace does not exist or do not have a public member

Maybe is because i am not a native englishspeaker, and i do not
understand good enough
Anybody could read these links adn tell me what is wrong?
Thank you in advance
Luis Martin