Gde grešim.....?
Dim provera As New WebService
Dim a As New WebService.zahtev
Dim b As WebService.odgovor
a= TextBox1.Text
provera.Credentials = New System.Net.NetworkCredential("username", "pass", "")
provera.PreAuthenticate = True
b= provera.vrati(a)
Prijavljuje grešku
Security Requirements not met - No Security header in message
Molim za pomoć......