hi
i am using hibernate 3 frame woark but i got some exception whil i m trying to get second-level caching.

my hibenate .cfg,xml.:---
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
<property name="connection.url">jdbc:oracle:thin:@10.20.21.14:1521:db3</property>
<property name="connection.username">crqa_08july</property>
<property name="connection.password">payplus</property>
<!-- <property name="default_schema">GRP_PAT_OWN</property> -->

<!-- JTA transaction properties (begin) -->
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
<property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.WeblogicTransactionManagerLookup</property>
<!-- JTA transaction properties (end) -->

<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">5</property>

<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>

<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>

<!-- Enable the second-level cache -->
<property name="hibernate.cache.use_query_cache">true</property>
<property name="hibernate.transaction.flush_before_completion">true</property>
<property name="hibernate.transaction.auto_close_session">true</property>
<property name="hibernate.connection.release_mode">after_transaction</property>
<property name="jdbc.use_streams_for_binary">true</property>
<property name="hibernate.transaction.flush_before_completion">true</property>
<property name="hibernate.transaction.auto_close_session">true</property>
<property name="hibernate.cache.use_second_level_cache">true</property>
<property name="hibernate.cache.provider_class">net.sf.ehcache.hibernate.EhCacheProvider</property>
<property name="net.sf.ehcache.configurationResourceName">ehcache.xml</property>
<!-- <property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
<property name="hibernate.cache.provider_configuration_file_resource_path">/ehcache.xml</property> -->



<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<property name="hibernate.format_sql">true</property>
<!-- Property added for weblogic -->
<property name="hibernate.query.factory_class">org.hibernate.hql.ast.ASTQueryTranslatorFactory</property>
<!-- <property name="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</property> -->


<mapping resource="com/it/cards/server/configuration/SystemParameters.hbm.xml"/>

<class-cache class="com.it.cards.server.vo.SystemParametersVO" usage="read-write"/>
<!-- <collection-cache collection="com.it.cards.server.vo.SystemParametersVO.ipkSystemParameters" usage="read-write"/>-->
</session-factory>
</hibernate-configuration>




my stack trace:>>>>>>>>>
Could not instantiate TransactionManagerLookup
at org.hibernate.transaction.TransactionManagerLookupFactory.getTransactionManagerLookup(TransactionManagerLookupFactory.java:47)
at org.hibernate.transaction.JTATransactionFactory.configure(JTATransactionFactory.java:44)
at org.hibernate.transaction.TransactionFactoryFactory.buildTransactionFactory(TransactionFactoryFactory.java:51)
at org.hibernate.cfg.SettingsFactory.createTransactionFactory(SettingsFactory.java:370)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:120)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:1881)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1174)
at com.it.cards.server.servlets.ControllerServlet.<clinit>(ControllerServlet.java:157)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at com.google.gwt.dev.shell.GWTShellServlet.tryGetOrLoadServlet(GWTShellServlet.java:869)
at com.google.gwt.dev.shell.GWTShellServlet.service(GWTShellServlet.java:238)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:595)