I'm just getting started with the DocuSign SOAP API, and I'm using the examples from their developer site as well as the GitHub site. While the two bits of code don't quite match, neither seems to work. I keep getting a System.ServiceModel.FaultException with the message, "Security requirements are not satisfied because the security header is not present in the incoming message."

I'm using a Service Reference with VS2012 to proxy the service <https://demo.docusign.net/api/3.0/dsapi.asmx>, and I have verified that my account works by using the online REST API explorer to obtain login information for my demo account.

Anyone run into this or have any suggestions?