Set iDoc = IE.Document gives Type Mismatch error

Hi,
I am having strange issue. Hopefully someone expert will help me here.
I am using 32 bit version IE 10
End user is using 64 bit version IE10

For me set iDoc = IE.Document works fine. But for end user I get "Type mismatch error"
Below is my code. Please help.

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

    Set IE = GetIE

    Navigate IE, "http://www.workpuddle.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

    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