GetDatabase Returning "Unable to connect to the remote server"

I am attempting to call the Get Database Rest API method from a Azure Web API application and am getting a WebException saying, "Unable to connect to the remote server". I am making a get request with the following request URI:

https://management.core.windows.net:8443/7f9cb3ce-8192-4ce6-96a6-87ee13fad4ca/services/sqlservers/servers/hq6z0zshw6.database.windows.net/databases/MWCStage"

I have added x-ms-version : 2012-03-01 header and am adding our management certificate to the request.

This should be a simple process. What am I missing?

Thanks,

Gordon