Thanks for your answer, Erel.
My doubt is because in this scenario you have to send a custom username and password to the server to call a webservice method due to the implementation of WSHttBinding.
I was checking a thread about HttpUtils2 and I see that you can do something like this:
job3.Username = "username"
job3.Password = "password"
job3.Download = "http://www.address.com/service/service.svc/GetData"
It would be this kind of features that you have to use in the case that I explain you?
Thank you.