Compatibility issue between Excel 2007 to Excel 2003

The following code is not working in excel 2003 where as It's working fine in excel 2007.
I guess there is a compatibility issue. how to change this to work fine in excel 2003 version.

Option Explicit

Private Declare Function URLDownloadToFile Lib "urlmon" Alias _
                                           "URLDownloadToFileA" ( _
                                           ByVal pCaller As Long, ByVal szURL As String, _
                                           ByVal szFileName As String, _
                                           ByVal dwReserved As Long, _
                                           ByVal lpfnCB As Long) As Long


Sub DownloadFileFromWeb()
Dim i As Integer

    Const strUrl As String = "https://myportal.com/ZZDR6.csv"

    Dim strSavePath As String
    Dim returnValue As Long
    
    strSavePath = "\\filesrv01\dsdf\SE\EERDV_1.csv"

    returnValue = URLDownloadToFile(0, strUrl, strSavePath, 0, 0)
    
End Sub