Simple Api Service fault

[#1]

I am trying out API proxy with a very simple rest service. However, I am getting the below response:

{"fault": {"faultstring": "The Service is temporarily unavailable","detail": {"errorcode": "messaging.adaptors.http.flow.ServiceUnavailable"}}}

when I invoke the API with below:

http://adityaanand-test.apigee.net/example/v1/Desc...

This should point to the actual service, which is here:

http://duxdnx.duckdns.org/IaaS/v1/DescribeAllOrder...

Attaching my config bundle here: example_iaas_rev1_2014_10_10.zip

What am I missing?!