org.jivesoftware.openfire.PrivateStorage - Internal server error

Hello guys,

when I am trying to log in with JWChat I got following exception:

2012.02.07 15:25:39 org.jivesoftware.openfire.PrivateStorage - Internal server error

com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Column ‘username’ cannot be null

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:931)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2985)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1631)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1723)

at com.mysql.jdbc.Connection.execSQL(Connection.java:3283)

at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1332)

at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1604)

at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1519)

at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1504)

at sun.reflect.GeneratedMethodAccessor139.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.logicalcobwebs.proxool.ProxyStatement.invoke(ProxyStatement.java:100)

at org.logicalcobwebs.proxool.ProxyStatement.intercept(ProxyStatement.java:57)

at $java.sql.Statement$$EnhancerByProxool$$2a9377d9.executeUpdate()

at org.jivesoftware.openfire.PrivateStorage.add(PrivateStorage.java:139)

at org.jivesoftware.openfire.handler.IQPrivateHandler.handleIQ(IQPrivateHandler.ja va:90)

at org.jivesoftware.openfire.handler.IQHandler.process(IQHandler.java:65)

at org.jivesoftware.openfire.IQRouter.handle(IQRouter.java:372)

at org.jivesoftware.openfire.IQRouter.route(IQRouter.java:121)

at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:76)

at org.jivesoftware.openfire.SessionPacketRouter.route(SessionPacketRouter.java:10 8)

at org.jivesoftware.openfire.SessionPacketRouter.route(SessionPacketRouter.java:69 )

at org.jivesoftware.openfire.http.HttpSession.sendPendingPackets(HttpSession.java: 636)

at org.jivesoftware.openfire.http.HttpSessionManager$HttpPacketSender.run(HttpSess ionManager.java:390)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)