How to Use Certificate for Two Way SSL and another certificate for WS Security Header at Client Appl

Hi,

I want to consume a Java Web service from Dotnet based client Application. The service require one Certificate("abc.PFX") for Two Way SSL purpose and another certificate("xyz.pfx") for WS security purpose to be passed from client Application(Dotnet Console based). I tried configuring the App.config of Client application to pass both the certs but getting Error says:

Could not establish secure channel for SSL/TLS with authority "******aaaa.com"

Please suggest how to pass both the certs from client Application..