Selenium - InternetExplorerDriver does not find the xpath

Good morning everyone!

I am using the Explorer control "InternetExplorerDriver" I can initially authenticate on one page but! when it goes to a second page it does not find the xpath that I put. Example

 Try
        Dim IExploreDrive As IWebDriver
        IExploreDrive = New InternetExplorerDriver

        'MUESTRA APLICACIÓN DE SIEBEL
        IExploreDrive.Navigate().GoToUrl("www.example.com")

        'USUARIO
        Dim Usuario As IWebElement = IExploreDrive.FindElement(By.XPath(".//*[@id='s_swepi_1']"))

        'CONTRASEÑA
        Dim Contrasena As IWebElement = IExploreDrive.FindElement(By.XPath(".//*[@id='s_swepi_2']"))

        Usuario.SendKeys(Login.usuario.ToString)
        Contrasena.SendKeys(Login.contr.ToString)

        'BOTON
        IExploreDrive.FindElement(By.Id("s_swepi_22")).Click()

        Thread.Sleep(1000)

        ''AQUI NO FUNCIONA NO LO ENCUENTRA
        Dim Activo As IWebElement = IExploreDrive.FindElement(By.XPath(".//*[@id='s_4_1_10_0']"))
        SendKeys.Send(txtActivo.ToString)

    Catch ex As Exception

    End Try

When I try to search for the last xpath, I can not find it because, change IE security options, disable protected mode and nothing.

I do not know how else to pass the Xpath to be able to write in a text field that exists on that site.

Someone could help me please.