JDBC4 with SQLXML and postgresql-8.4-702.jdbc4.jar

Hi,

I'm having trouble of inserting an SQLXML in my Postgresql 8.4 database :

java.lang.ClassCastException: org.postgresql.jdbc4.Jdbc4SQLXML cannot be
cast to [B
at
org.postgresql.jdbc2.AbstractJdbc2ResultSet.updateRowBuffer(AbstractJdbc2ResultSet.java:1729)
at
org.postgresql.jdbc2.AbstractJdbc2ResultSet.updateRow(AbstractJdbc2ResultSet.java:1291)

when i use that :

SQLXML sqlxml = con.createSQLXML();
DOMResult domResult=sqlxml.setResult(DOMResult.class)
domResult.setNode(xmldocumentDOM);

stmt.setSQLXML(1, sqlxml);
stmt.execute();

Do you have an idea, why ?

Thank you very much for your futur help :)