问在VBA中设置iDoc = IE.Document会出现运行时错误

EN

Function Run() As Integer
    Dim IE As InternetExplorer
    Dim dataCount%

    Set IE = GetIE

    Navigate IE, "http://www.my-url-here.com/index.php"
    Call Login(IE)
    IE.Quit
End Function

Private Sub Login(IE As InternetExplorer)
    Dim iDoc As HTMLDocument
    Dim uName$, pwd$
    Set iDoc = IE.Document   ' here is where it gives type mismatch error

    Call GetLoginDetails(jobBoard, uName, pwd)

    iDoc.getElementById("login").Value = uName
    iDoc.getElementById("pw").Value = pwd
    iDoc.getElementsByClassName("sub_btn")(0).Click

    Sync IE
End Sub

    Sub Sync(IE As InternetExplorer)
        Do While IE.Busy Or IE.ReadyState <> READYSTATE_COMPLETE
            Application.Wait Now + TimeSerial(0, 0, 1)
        Loop

        Do While IE.Document.ReadyState <> "complete"
            Application.Wait Now + TimeSerial(0, 0, 1)
        Loop

        'Debug.Print "Out: " & IE.Document.ReadyState
    End Sub

    Sub Navigate(IE As InternetExplorer, address$)
        IE.Navigate address
        Sync IE
    End Sub

    Function GetIE() As InternetExplorer
        Set GetIE = New InternetExplorer

        With GetIE
            .Visible = True

            .Height = 550
            .Width = 800

            .Left = Application.Width - .Width
        End With
    End Function