Hola, he conseguido eliminar un error pero obtengo otro:
   Cita:  Buildfile: C:\Documents and Settings\empalacios\workspaceManningJP\HelloWorldJ  P\build.xml
clean:
   [delete] Deleting directory C:\Documents and Settings\empalacios\workspaceManningJP\HelloWorldJ  P\bin
    [mkdir] Created dir: C:\Documents and Settings\empalacios\workspaceManningJP\HelloWorldJ  P\bin
compile:
    [javac] Compiling 3 source files to C:\Documents and Settings\empalacios\workspaceManningJP\HelloWorldJ  P\bin
copymetafiles:
     [copy] Copying 2 files to C:\Documents and Settings\empalacios\workspaceManningJP\HelloWorldJ  P\bin
run:
     [java] 05-mar-2010 13:47:29 org.hibernate.cfg.Environment <clinit>
     [java] INFO: Hibernate 3.3.2.GA
     [java] 05-mar-2010 13:47:29 org.hibernate.cfg.Environment <clinit>
     [java] INFO: hibernate.properties not found
     [java] 05-mar-2010 13:47:29 org.hibernate.cfg.Environment buildBytecodeProvider
     [java] INFO: Bytecode provider name : javassist
     [java] 05-mar-2010 13:47:29 org.hibernate.cfg.Environment <clinit>
     [java] INFO: using JDK 1.4 java.sql.Timestamp handling
     [java] 05-mar-2010 13:47:29 org.hibernate.cfg.Configuration configure
     [java] INFO: configuring from resource: /hibernate.cfg.xml
     [java] 05-mar-2010 13:47:29 org.hibernate.cfg.Configuration getConfigurationInputStream
     [java] INFO: Configuration resource: /hibernate.cfg.xml
     [java] 05-mar-2010 13:47:29 org.hibernate.cfg.Configuration addResource
     [java] INFO: Reading mappings from resource : hello/Message.hbm.xml
     [java] 05-mar-2010 13:47:29 org.hibernate.cfg.HbmBinder bindRootPersistentClassCommonValues
     [java] INFO: Mapping class: hello.Message -> MESSAGES
     [java] 05-mar-2010 13:47:29 org.hibernate.cfg.Configuration doConfigure
     [java] INFO: Configured SessionFactory: null
     [java] 05-mar-2010 13:47:29 org.hibernate.connection.DriverManagerConnectionPr  ovider configure
     [java] INFO: Using Hibernate built-in connection pool (not for production use!)
     [java] 05-mar-2010 13:47:29 org.hibernate.connection.DriverManagerConnectionPr  ovider configure
     [java] INFO: Hibernate connection pool size: 20
     [java] 05-mar-2010 13:47:29 org.hibernate.connection.DriverManagerConnectionPr  ovider configure
     [java] INFO: autocommit mode: false
     [java] 05-mar-2010 13:47:29 org.hibernate.connection.DriverManagerConnectionPr  ovider configure
     [java] INFO: using driver: org.hsqldb.jdbcDriver at URL: jdbc:hsqldb:hsql://localhost
     [java] 05-mar-2010 13:47:29 org.hibernate.connection.DriverManagerConnectionPr  ovider configure
     [java] INFO: connection properties: {user=sa}
     [java] 05-mar-2010 13:47:30 org.hibernate.cfg.SettingsFactory buildSettings
     [java] ADVERTENCIA: Could not obtain connection to query metadata
     [java] java.sql.SQLException: socket creation error
     [java] 	at org.hsqldb.jdbc.Util.sqlException(Unknown Source)
     [java] 	at org.hsqldb.jdbc.jdbcConnection.<init>(Unknown Source)
     [java] 	at org.hsqldb.jdbcDriver.getConnection(Unknown Source)
     [java] 	at org.hsqldb.jdbcDriver.connect(Unknown Source)
     [java] 	at java.sql.DriverManager.getConnection(Unknown Source)
     [java] 	at java.sql.DriverManager.getConnection(Unknown Source)
     [java] 	at org.hibernate.connection.DriverManagerConnectionPr  ovider.getConnection(DriverManagerConnectionProvid  er.java:133)
     [java] 	at org.hibernate.cfg.SettingsFactory.buildSettings(Se  ttingsFactory.java:111)
     [java] 	at org.hibernate.cfg.Configuration.buildSettingsInter  nal(Configuration.java:2119)
     [java] 	at org.hibernate.cfg.Configuration.buildSettings(Conf  iguration.java:2115)
     [java] 	at org.hibernate.cfg.Configuration.buildSessionFactor  y(Configuration.java:1339)
     [java] 	at persistence.HibernateUtil.<clinit>(Unknown Source)
     [java] 	at hello.HelloWorld.main(Unknown Source)
     [java] Exception in thread "main" java.lang.ExceptionInInitializerError
     [java] 	at persistence.HibernateUtil.<clinit>(Unknown Source)
     [java] 	at hello.HelloWorld.main(Unknown Source)
     [java] Caused by: org.hibernate.HibernateException: 'hibernate.dialect' must be set when no Connection avalable
     [java] 	at org.hibernate.dialect.resolver.DialectFactory.buil  dDialect(DialectFactory.java:107)
     [java] 	at org.hibernate.cfg.SettingsFactory.buildSettings(Se  ttingsFactory.java:134)
     [java] 	at org.hibernate.cfg.Configuration.buildSettingsInter  nal(Configuration.java:2119)
     [java] 	at org.hibernate.cfg.Configuration.buildSettings(Conf  iguration.java:2115)
     [java] 	at org.hibernate.cfg.Configuration.buildSessionFactor  y(Configuration.java:1339)
     [java] 	... 2 more
     [java] Java Result: 1
BUILD SUCCESSFUL
Total time: 3 seconds
    Entiendo que no conecta a la bbdd hsql por algún motivo, ¿podéis echarme un cable? Muchas gracias, un saludo