Not work, no Url inside the proxy class. Is my call wrong?
I'm guessing you did not thoroughly read the svcutil.exe reference documentation which clearly indicates the svcutil.exe creates a output.config file. The config file contains the URL as well as other configurations. Either rename output.config to app.config and place the file in the application root or copy the appropriate nodes to you app.config file.
Keep in mind, I'm just guessing what's wrong as I do not have the wsdl, service documentation, and you've provide very little code. Still the service owners are your best option. Otherwise, maybe hire someone that can help you.
Example configuration that uses HTTP. Change to Transport security for HTTPS.
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<system.serviceModel>
<bindings>
<basicHttpBinding>
<binding name="WebServiceSoap">
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Basic" />
</security>
</binding>
</basicHttpBinding>
</bindings>
<client>
<endpoint address="http://localhost/WebService/WebService.asmx"
binding="basicHttpBinding" bindingConfiguration="WebServiceSoap"
contract="WebServiceSoap" name="WebServiceSoap" />
</client>
</system.serviceModel>
</configuration>
Implementation
static void Main(string[] args)
{
WebServiceSoapClient client = new WebServiceSoapClient("WebServiceSoap");
client.ClientCredentials.UserName.UserName = "username";
client.ClientCredentials.UserName.Password = "password!";
string resposne = client.HelloWorld();
Console.WriteLine(resposne);
}