web form show

what is wrong with this? all i want is to show the next web page. textbox1 is normal text and textbox2 is a password text.

Private Sub Button1_ServerClick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ServerClick
If TextBox1.Text = "josef" And TextBox2.Text = "josef" Then
chatbox.show()
End If
End Sub

formname.show, there is no such a thing in ASP.NET.
You can use response.redirect ("url") to navigate to another page.