This is what your link showed me:
<?xml version="1.0" encoding="UTF-8" ?>
- <Error>
<Code>AccessDenied</Code>
<Message>Request has expired</Message>
<RequestId>C576EDCA5CE2CFB7</RequestId>
<Expires>2011-10-06T17:54:50Z</Expires>
<HostId>I4EparTmFBVNLS3K5x5aw5edQFTqr1j+x+fgVXMQcZVAKH+M3yzit/E36gU82lKB</HostId>
<ServerTime>2011-10-06T18:00:43Z</ServerTime>
</Error>