Problem with consuming .NET web service with NuSOAP..

--------------010702020903070602040705
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

After spending more than two weeks looking for a way to consume a .NET
web service with php, i realized that there is no real step by step help
for it. But anyway, i got everything working except for one thing.
Here's the deal -

I'm connecting to a .NET web service at a https wsdl address(belonging
to one of my clients). First the web service had no authentication and
everything was working fine. Then, after i told them to turn on
authentication, they gave me a username and password and the error
message that i'll get if authentication fails. I tried every possible
way to send that username and password but i still get the error
message.. If authentication is turned on, should i be able to view the
WSDL at the https address without it asking me for any login details?
I'm trying to figure out the problematic area.. here's my code..


$c = new nusoap_client("https://somesite/someService.asmx?WSDL", 'wsdl');

$c->setCredentials('username', password');


$err = $c->getError();
if ($err) {
echo '

Constructor error

' . $err . '