I'm trying to start Pentaho 5.0 and I get the following error in the log:

Caused by: java.lang.LinkageError: JAXB 2.1 API is being loaded from the bootstrap classloader, but this RI (from jar:file:/D:/PENTAHO5/biserver-ce/tomcat/webapps/pentaho/WEB-INF/lib/jaxb-impl-2.2.3-1.jar!/com/sun/xml/bind/v2/model/impl/ModelBuilder.class) needs 2.2 API. Use the endorsed directory mechanism to place jaxb-api.jar in the bootstrap classloader. (See http://java.sun.com/j2se/1.6.0/docs/guide/standards/)
at com.sun.xml.bind.v2.model.impl.ModelBuilder.<clinit>(ModelBuilder.java:177)

What version of Java should I use?
How can I solve this problem?