Connecting to a web service using https

[Jeppe Sommer]

I am trying to connect to an external webservice using https. My webserver is a Apache Tomcat/5.5.25, JVM 1.5.0_01-b08.

I have imported the root certficate from the external server in my keystore, but I still on getting the following error:

Detail:javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

- Do I have to set any system property path in my code or maybe changing the settings in the server.xml file?

Thanks in advance.