How to connect to service-now SOAP API through a proxy with authentification

Hello,

I'm trying to connect vCo (5.5.3) to service-now.com to do some insert call.

I have one login to connect to the proxy and another to connect to service-now, I can't find how to pass the 2 logins in vCo.

I'm able to do it with SoapUI for testing with the proxy authentication in the Authorization window and one more authorization header for the service now login like "Authorization Basic XXXXNzYl93cXXXXXXXX"

With vCo In the workflow "Add a SOAP host" if I provide the proxy login and a local WSDL I can add the host but after I can't invoke anything, I have the error "Transport error: 403 Error: Forbidden" and I don't know how to provide the header for basic authentication in service-now.

If I provide the service-now login when adding the SOAP Host I have the error "Unable to tunnel through proxy. Proxy returns "HTTP/1.1 407 Proxy Authentication Required"

Could you provide me some help?

Thanks

Raphaël