SSL PRoblem

SSL received a record that exceeded the maximum permissible length. 
(Error code: ssl_error_rx_record_too_long)


I get this above error when i try to get to a page via https:// in firefox but http works fine. I use the code below to connect to a the page securely via https
string strURL;
            strURL = Request.Url.AbsoluteUri.ToString();
            strURL = strURL.Substring(0, strURL.LastIndexOf('/'));
            strURL = strURL.Replace("http://", "https://");
            Response.Redirect(strURL + "/Payment.aspx?ListID=" + ListID + "/" + PageMode + "&Update=false", false);
When I navigate to the page  , I get the ssl error, but whe ...