http://bugs.winehq.org/show_bug.cgi?id=21089
--- Comment #10 from Hans Leidekker hans@meelstraat.net 2009-12-20 07:32:57 --- Created an attachment (id=25306) --> (http://bugs.winehq.org/attachment.cgi?id=25306) wininet: Always set last error in HttpSendRequest{,Ex}.
Try this patch.