Consuming Oracle Web Service in DAX2009


is there any posible to consuming web service from Oracle?

I add the reference and wrote the class. But when I run the code I get an error:

"[…]The HTTP request is unauthorized with client authentication scheme ‘Anonymous’. The authentication header received from the server was ‘Basic realm=“XDB”’[…] "

then change the binding security:
MODE: from “None” to the “TransportCredentialOnly”
TransportClientCredentialType: from “None” to “Basic”

Then I get an another error:
“System.InvalidOperationException: The username is not provided. Specify username in ClientCredentials.”

But where I can add the username?
I try add the clientCredential in endpoint behavior but it’s still not working.

Maybe someone had a similar problem.