dear frined
i done this in another way.
i created one one link module.from that link button click i passed dnn username .
joe u r doing a gr8 job.thank u so much 4 ur support.
Protected Sub LinkButton1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles LinkButton1.Click
Dim objUser As UserInfo = UserController.GetCurrentUserInfo
Dim user4mapping As String
user4mapping = objUser.Username
Page.ClientScript.RegisterClientScriptBlock(Me.GetType(), "popup", "window.open('
http://192.168.151.15:88/webform1.a...?username=" & user4mapping & "','','scrollbars=no,menubar=no,height=650,width=screen.width,resizable=no,toolbar=no,location=no,status=no')", True)
LblUserDisplay.Text = ""
LblUserDisplay.Text = "WELCOME TO & " & user4mapping & " & 4 AFTI MAPS.........."
End Sub