webshpere studio application developer 中 jndi 访问DATASOURCE DB.7.2

webshpere studio application developer 中 jndi 访问DATASOURCE出现下面的错误，请高手帮忙！

在服务器上我设置了DATasource是jdbc/ds1

Get connection failed.javax.naming.NamingException: The JNDI operation "lookup"on the context "localhost/nodes/localhost/servers/server1" with the name "jdbc/ds1" failed.  Please get the root cause Throwable contained in this NamingException for more information.  Root exception is java.lang.NoClassDefFoundError: com/ibm/ejs/jts/jts/CurrentFactory at com.ibm.ws.naming.jndicos.CNContextImpl.suspendTransaction(CNContextImpl.java:4064) at com.ibm.ws.naming.jndicos.CNContextImpl.cosResolve(CNContextImpl.java:3521) at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1565) at com.ibm.ws.naming.jndicos.CNContextImpl.doLookup(CNContextImpl.java:1525) at com.ibm.ws.naming.jndicos.CNContextImpl.lookup(CNContextImpl.java:1225) at com.ibm.ws.naming.util.WsnInitCtx.lookup(WsnInitCtx.java:132) at javax.naming.InitialContext.lookup(InitialContext.java:359) at com.portaldev.test.testJNDI.getJndi(testJNDI.java:57) at com.portaldev.test.testJNDI.main(testJNDI.java:27)