OpenSAML user discussion

Thank You very much for your answers.

I get an other problem with the ParserPoolManager this time...

ParserPoolManager ppMgr = ParserPoolManager.getInstance();

The error is :
java.lang.NoSuchMethodError: 
javax.xml.parsers.DocumentBuilderFactory.setFeature(Ljava/lang/String;Z)V; 
nested exception is: 
        java.lang.NoSuchMethodError: 
javax.xml.parsers.DocumentBuilderFactory.setFeature(Ljava/lang/String;Z)V

After a search it seems that could come from xerces.
So I downloaded the last version of xerces (Xerces 2.8.0) and I decided to 
change my Java SDK because it seems there are some problems with the SDK 1.4. 
I installed the last version as well (JDK 5). I updated the libraries and the 
classpath.

I still get this error, and it seems related to the opensaml library which 
calls this method (maybe ParserPoolManager.java).
In tomcat, it also tells me :

at org.opensaml.xml.parse.ParserPool.<init>(ParserPool.java:83)
at org.opensaml.common.xml.ParserPoolManager.<init>(ParserPoolManager.java:73)
at 
org.opensaml.common.xml.ParserPoolManager.<clinit>(ParserPoolManager.java:50)
.
.
.

We do not know what is the problem after all the changes we have made in our 
configuration. Well, we are still beginners in saml, so sorry if that obvious 
:)
Thank you anyway for your help.

PS : don't worry about the fact that opensaml2 is not yet official. We are 
working on a university project evolving with the new technologies. It is not 
(yet) actually a "real system".