InternetOpenUrl возвращает 0

[Nikita]

Пользуюсь стандартным примером InternetOpenUrl -

Const INTERNET_OPEN_TYPE_DIRECT = 1
Const INTERNET_OPEN_TYPE_PROXY = 3
Const INTERNET_FLAG_RELOAD = &H80000000
Const sURL = "http://www.microsoft.com/index.htm"
Private Declare Function InternetOpen Lib "wininet" Alias "InternetOpenA" (ByVal sAgent As String, ByVal lAccessType As Long, ByVal sProxyName As String, ByVal sProxyBypass As String, ByVal lFlags As Long) As Long
Private Declare Function InternetCloseHandle Lib "wininet" (ByVal hInet As Long) As Integer
Private Declare Function InternetReadFile Lib "wininet" (ByVal hFile As Long, ByVal sBuffer As String, ByVal lNumBytesToRead As Long, lNumberOfBytesRead As Long) As Integer
Private Declare Function InternetOpenUrl Lib "wininet" Alias "InternetOpenUrlA" (ByVal hInternetSession As Long, ByVal lpszUrl As String, ByVal lpszHeaders As String, ByVal dwHeadersLength As Long, ByVal dwFlags As Long, ByVal dwContext As Long) As Long
Private Sub Form_Load()

Dim hOpen As Long, hFile As Long, sBuffer As String, Ret As Long
'Create a buffer for the file we're going to download
sBuffer = Space(1000)
'Create an internet connection
hOpen = InternetOpen(scUserAgent, INTERNET_OPEN_TYPE_DIRECT, vbNullString, vbNullString, 0)
'Open the url
hFile = InternetOpenUrl(hOpen, sURL, vbNullString, ByVal 0&, INTERNET_FLAG_RELOAD, ByVal 0&)
'Read the first 1000 bytes of the file
InternetReadFile hFile, sBuffer, 1000, Ret
'clean up
InternetCloseHandle hFile
InternetCloseHandle hOpen
'Show our file
MsgBox sBuffer
End Sub

InternetOpen возвращает нормальный handle - 13369348, а InternetOpenUrl возвращает 0, причем если сразу поcле него взять GetLastError получаем The operation was successfull

В чем дело?
Этот код корректно работает на другой машине, здесь у меня интернет через прокси, там - напрямую. Однако, я попробовал использовать INTERNET_OPEN_TYPE_PROXY вместо INTERNET_OPEN_TYPE_DIRECT, результат тот же. InternetOpen возвращает нормальный handle в обоих случаях.