Borland C++, SOAP, proxy and basic auth

I am programming a very simple utility which connects to a SOAP server.
The utility will be installed on a client which connects to the Internet through
a proxy server providing user and passwd.
In other hand, the SOAP server requires basic authentication, but when I look at
Borland SOAP components it only provide properties for proxy, user and password,
and recomends you to use user nad password for both, proxy and server auth.
This is a nosense, because proxy users are not the same than server users.
How do y handle this? any idea?
thanks