CWebControl PostData

I'm using the following code in a VC++5.0(no patches applied), IE4.01
configuration and postData is not working.  The web browser control
navigates to the url I give it, but it's method is GET and it doesn't send
my postData.  When PostData is not NULL it's supposed to send a
request method of POST and send the data.

Also I sent a breakpoint in BeforeNavigate2() and read the PostData string
it's empty!

Here is the code snippet from my app.

void CMyView::SetNavigationLocation(CString url, CString postData)
{
    //    url = "http://www.ecst.csuchico.edu/~jschlich/Flyfish/fishinfotest.cgi";
   //    postData = "userid=tim_z&pass=dont_you_wish";

    CString header;
    // Content-Type: application/x-www-form-urlencoded\r\n
    header.LoadString(IDS_FORM_URLENCODED);

    COleVariant oleVariant;
    COleVariant urlOleVariant( url );
    COleVariant dataOleVariant( postData );
    COleVariant headerOleVariant( header );

    m_WebBrowser.Navigate2(&urlOleVariant, &oleVariant, &oleVariant, &dataOleVariant, &headerOleVariant);
}

This problem has got me at a complete stand still.  If anyone can help, I will be very
very grateful and acknowledge you as the MFC WebBrowser guru!

Jeff