Hi any body helpme i got this problem

SEVERE: could not read a hi value - you need to populate the table: category_pk
Exception in thread "main" org.hibernate.id.IdentifierGenerationException: could
not read a hi value - you need to populate the table: category_pk

here is the code

<hibernate-mapping>
<class name="Category" table="Category">
<id name="cid" column="cid">
<generator class="hilo">
<param name="table">category_pk</param>
<param name="column">cid</param>
<param name="max lo">100</param>
</generator>
</id>
<property name="cname" column="cname"/>
<property name="cdescr" column="cdescr"/>
</class>
</hibernate-mapping>



<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory >
<property name="connection.driver_class">sun.jdbc.odbc.JdbcOdbcDriver</property>
<property name="connection.url">jdbc:odbc:ShigaInfo</property>
<property name="connection.username">system</property>
<property name="connection.password">manager</property>
<property name="show_sql">true</property>
<property name="hibernate.dialect">org.hibernate.dialect.OracleDialect</property>
<mapping resource="Category.hbm.xml"/>

</session-factory>
</hibernate-configuration>



import org.hibernate.*;
import org.hibernate.cfg.*;

public class Client{

public static void main(String rags[]){

Configuration c=new Configuration();
c.configure("/hibernate.cfg.xml");
SessionFactory sf=c.buildSessionFactory();
Session s=sf.openSession();
Transaction tx=s.beginTransaction();
Category c1=new Category();
c1.setCid(1);
c1.setCname("books");
c1.setCdescr("Books for good Health & wealth");
s.save(c1);
s.flush();
tx.commit();
s.close();
}

}


regards

hazarath