[Pki-users] "PKI Subsystem Configuration" help

Hi, all, I am trying to install Dogtag Certificate System, but at the "PKI Subsystem Configuration", we have the problem at step: "Creat e a New Securit y Domain", whatever we enter, it display error "$errorString", and if we choose the "Join an Existing Security Domain ", it display error "org.xml.sax.SAXParseException: The string "--" is not permitted within comments." So, we can't go on, please tell me what's the problem, and how to do? thanks a lot. Best Regards, Jeff