code to works some extent, but next page not loading ? !
further advise please

vb.net Code:
  1. Imports System.Web
  2. Public Class web
  3.     Inherits System.Windows.Forms.Form
  4.  
  5.  
  6.     Private Sub web_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
  7.  
  8.         With Me.WebBrowser1
  9.             .Navigate("http://203.176.113.112/CMSREPORT/JSP/nonloginreports/CMSAnalysisStatistics.do?hmode=home")
  10.         End With
  11.  
  12.     End Sub
  13.  
  14.     Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
  15.  
  16.         With Me.WebBrowser1
  17.  
  18.             Me.WebBrowser1.Document.Forms.Item(0).DomElement(1).value = "UBL1425"
  19.             'in fact i want to si mulate click go button ( i mean label)
  20.             Me.WebBrowser1.Document.Forms(0).InvokeMember("submit")
  21.             'why yhe next page is not loading here ?? !!!!
  22.             'but if i click manually on the go label next page is loading
  23.         End With
  24.     End Sub