BIRT Exception in EGL and WebSphere

Hi All, I wrote my web application to generate a report , I was using
BIRT Engenie, but when I run the program into WebSphere for create a
pdf file the application show me this:

Error 500: #{VendorsList.printList}: javax.faces.el.EvaluationException:
java.lang.LinkageError: LinkageError while defining class:
org.eclipse.birt.report.model.api.activity.SemanticException Could not be
defined due to: org/eclipse/birt/report/model/api/activity/SemanticException
(Unsupported major.minor version 49.0) This is often caused by having a class
defined at multiple locations within the classloader hierarchy. Other potential
causes include compiling against an older or newer version of the class that has
an incompatible method signature. Dumping the current context classloader
hierarchy: ==> indicates defining classloader ==>[0]
com.ibm.ws.classloader.CompoundClassLoader@7d9c12f8 Local ClassPath:
C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\classes;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\commons-codec-1.3.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\coreapi.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\engineapi.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\fda7.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\js.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\jsf-ibm.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\modelapi.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\odc-jsf.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\rte.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\scriptapi.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent\WEB-INF\lib\sitelib.jar;C:\Users\nuvek\IBM\rationalsdp\workspace\VendorsWeb\WebContent;
Delegation Mode: PARENT_FIRST [1]
com.ibm.ws.classloader.JarClassLoader@2105856760 Local Classpath: Delegation
mode: PARENT_LAST [2] com.ibm.ws.classloader.ProtectionClassLoader@2d912f8 [3]
com.ibm.ws.bootstrap.ExtClassLoader@39d212fa [4]
sun.misc.Launcher$AppClassLoader@39c512fa [5]
sun.misc.Launcher$ExtClassLoader@39c112fa ---Original exception---
java.lang.UnsupportedClassVersionError:
org/eclipse/birt/report/model/api/activity/SemanticException (Unsupported
major.minor version 49.0) at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java(Compiled Code)) at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java(Compiled
Code)) at
com.ibm.ws.classloader.CompoundClassLoader._defineClass(CompoundClassLoader.java:576)
at
com.ibm.ws.classloader.CompoundClassLoader.findClass(CompoundClassLoader.java(Compiled
Code)) at
com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java(Compiled
Code)) at java.lang.ClassLoader.loadClass(ClassLoader.java(Compiled Code)) at
egl.report.birt.EventHandlerList.add(EventHandlerList.java:36) at
programs.reportHandler.$initreportHandler(reportHandler.java:140) at
programs.reportHandler.<init>(reportHandler.java:34) at
jsfhandlers.VendorsList.$func_printList(VendorsList.java(Compiled Code)) at
jsfhandlers.VendorsList.dispatchToAction(VendorsList.java:11577) at
jsfhandlers.VendorsList.printList(VendorsList.java:11550) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled
Code)) at java.lang.reflect.Method.invoke(Method.java(Compiled Code)) at
com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:127) at
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:73)
at javax.faces.component.UICommand.broadcast(UICommand.java:312) at
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:302) at
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:416) at
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:77)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:201) at
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:91) at
javax.faces.webapp.FacesServlet.service(FacesServlet.java:197) at
com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1212)
at
com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:629)
at
com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:80)
at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1657) at
com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:77) at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:421)
at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:367)
at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:276)
at
com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminaters(NewConnectionInitialReadCallback.java:201)
at
com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:103)
at
com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:548)
at
com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:601)
at
com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:934)
at
com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1021)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1332) --- end Original
exception----

I used the version 2.1.3 of birt runtime and Rational Business
Developer 7.5.1, somebody help me please??