[xwiki-users] Oracle 9 problem

Hi all, I have to setup a XWiki installation that uses Oracle as RDBMS. I configured the hibernate.cfg and inserted the Oracle JAR in the lib folder. I get an exception in by tomcat. My "xwiki.log" says: 16:24:33,567 [http-38080-Processor25] WARN util.JDBCExceptionReporter - SQL Error: 17070, SQLState: null 16:24:33,582 [http-38080-Processor25] ERROR util.JDBCExceptionReporter - La dimensione dei dati è superiore alla dimensione massima per questo tipo: 14255 16:24:33,582 [http-38080-Processor25] ERROR .AbstractFlushingEventListener - Could not synchronize database state with session The database tables have been created. Can someone help me? Do you need additional informations? Thanks, Loris