Why do I get "Failed to parse source: Premature end of file. @ *unknown*[-1,-1]" when starting JBoss?

Issue

After enabling following equence in server.xml:

<!-- SSL/TLS Connector configuration using the admin devl guide keystore -->
<Connector protocol="HTTP/1.1" SSLEnabled="true"
      port="8443" address="0.0.0.0"
      scheme="https" secure="true" SSLEnabled="true" clientAuth="false"
      SSLCertificateFile="/usr/webapps/onba/conf/ssl/tomcat.crt"
      SSLCertificateKeyFile="/usr/webapps/onba/conf/ssl/tomcat.pem"
      SSLPassword="xxxxx"
      SSLProtocol="TLSv1"/>

we received following error:

2010-06-02 14:41:52,084 ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] Error installing to Start: name=WebServer state=Create
org.jboss.xb.binding.JBossXBException: Failed to parse source: Premature end of file. @ *unknown*[-1,-1]
...
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