Authenticate with Custom Activities that Consume SOAP Services with Custom Types?

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1

I’ve successfully created custom activities for numerous methods for two different SOAP services. Authentication is required using Windows authentication and many of the methods use a custom type.

When I attempted to use my new custom activities, there is no means of authentication. I get unauthorized errors, as the services do not allow anonymous access.

I can authenticate with HTTP, but it doesn’t seem to last more than the one HTTP request. I cannot use SOAP activities because of the custom types, which just cause odd errors. How can I get these custom activities to work? And if I can’t, is there a way to consume this service otherwise?