I want to secure a webservice using Netbeans with mechansim : "Message Authentication over SSL" and I do everything that Netbeans documentation and
Sun WSIT tutorial told to do. I also import the generated SSL key in client jre but when I run the client code, I still got this error :

Failed to access the WSDL at: https://localhost:8443/SecureWebService?wsdl. It failed with:
sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target.

can someone help me please ?