Crystal Report And SQL Commands

I have a problem in showing data content from joined table in crystal report my sql query is good and it shown my own data but I when fill crystal report datasource and show it the crystal repeat duplicate and more data my code is:

Dim rep As CrystalReport1 = New CrystalReport1()
Dim objcon = New SqlConnection("data source=(local);initial catalog=hesabres;user id='sa';password='Maysam7026'")
Dim objcom = New SqlCommand
Dim objdata As New DataTable
Dim objdr As SqlDataReader
[Code] .....