CR VS 2010 SQL query issue

Hi all

I'm facing a problem with my code.

Dimcr AsNewCrystalReport1()

Dim newCmd AsSqlCommand

Dim conn AsSqlConnection

Dim da AsNewSqlDataAdapter

Dim ds AsNewDataSet

Dim cr AsNewCrystalReport1

Dim MyConnectionStr AsString = "Data Source=MyDB;Initial catalog=MyCat;Integrated Security=true;"' providerName=System.data.sqlClient"

conn = NewSqlConnection(MyConnectionStr)

Dim cmdText AsString

    cmdText=" SELECT customer.customer_name, customer.customer_tel, orders.order_stuff_name, orders.order_number"& _
" FROM   hesabres.dbo.orders orders inner JOIN hesabres.dbo.customer customer ON orders.order_customer_id=customer.customer_id"

da = NewSqlDataAdapter(newCmd)

da.fill(ds)

cr.SetDataSource(ds.Tables(0))

crystalviewer1.ReportSource = cr

conn.Close()

  newCmd.Dispose()

if i run the query, let's say it returns 2 rows

I my CR veiwer, it shows 4 rows  (duplicates 2 x 2),

if the query returns 3 rows, CR displays 9 rows (3 x 3) and so on 10 (10x10)....

How is it possible??

In my Dataset, the number of rows is always correct!

Do you have any idea?

Thanks in advance.

B.