Amazon S3 does not work

Harry Wang tried to configure the demo server at http://oae.oae-qa0.oaeproject.org using S3 but cannot upload files.

![791ca30e-5b8c-11e3-890e-92e347d948f0](https://f.cloud.github.com/assets/109850/1662339/38152856-5bfd-11e3-91a3-d9d67a5e4a45.png)
![791d769e-5b8c-11e3-9f5b-9e54138cf8aa](https://f.cloud.github.com/assets/109850/1662350/53c12ca8-5bfd-11e3-9ede-ca7bb85db984.png)