ServletRedirector: java.lang.NoClassDefFoundError: org.aspectj.lang.Signature

I am running Cactus from Eclipse IDE. I am new to Cactus

i do have all the jar files in the classpath

but when i run the test case from Eclipse, it throws the following error in
the log file

[Servlet Error]-[ServletRedirector]: Failed to load servlet:
java.lang.NoClassDefFoundError: org.aspectj.lang.Signature
        at java.lang.Class.verifyImpl(Native Method)
        at java.lang.Class.verify(Class.java:241)
        at java.lang.Class.initialize(Class.java:304)
        at java.lang.Class.newInstanceImpl(Native Method)
        at java.lang.Class.newInstance(Class.java:1545)
        at java.beans.Beans.instantiate(Beans.java:219)
        at java.beans.Beans.instantiate(Beans.java:63)
        at com.ibm.ws.webcontainer.webapp.WebAppServletManager.loadServlet(
WebAppServletManager.java:188)
        at
com.ibm.ws.webcontainer.webapp.WebAppServletManager.getServletReference(
WebAppServletManager.java:455)
        at com.ibm.ws.webcontainer.webapp.WebApp.getServletReference(
WebApp.java:726)
        at
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcherInfo.calculateInfo(
WebAppRequestDispatcherInfo.java:197)
        at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcherInfo
.<init>(WebAppRequestDispatcherInfo.java:68)
        at com.ibm.ws.webcontainer.webapp.WebApp.getRequestDispatcher(
WebApp.java:1564)
        at com.ibm.ws.webcontainer.webapp.WebApp.getRequestDispatcher(
WebApp.java:1523)
        at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(
WebAppInvoker.java:290)
        at
com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(
CachedInvocation.java:71)
        at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI
(ServletRequestProcessor.java:246)
        at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service
(OSEListener.java:334)
        at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(
HttpConnection.java:56)
        at com.ibm.ws.http.HttpConnection.readAndHandleRequest(
HttpConnection.java:652)
        at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:448)
        at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:936)


and the following error trace in the Eclipse IDE

org.apache.cactus.util.ChainedRuntimeException: Failed to get the test
results. This is probably due to an error that happened on the server side
when trying to execute the tests. Here is what was returned by the server :
[Error 500: Failed to load target servlet [ServletRedirector]
]
    at org.apache.cactus.client.AbstractHttpClient.dispatch2_doTest(
LogAspect.aj(1k):120)
    at org.apache.cactus.client.AbstractHttpClient.around2_doTest(
LogAspect.aj(1k):1236)
    at org.apache.cactus.client.AbstractHttpClient.doTest(LogAspect.aj
(1k):104)
    at org.apache.cactus.AbstractWebTestCase.runGenericTest(
AbstractWebTestCase.java:260)
    at org.apache.cactus.ServletTestCase.runTest(ServletTestCase.java:133)
    at org.apache.cactus.AbstractTestCase.runBare(AbstractTestCase.java:195)
    at junit.framework.TestResult$1.protect(TestResult.java:106)
    at junit.framework.TestResult.runProtected(TestResult.java:124)
    at junit.framework.TestResult.run(TestResult.java:109)
    at junit.framework.TestCase.run(TestCase.java:118)
    at junit.framework.TestSuite.runTest(TestSuite.java:208)
    at junit.framework.TestSuite.run(TestSuite.java:203)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(
RemoteTestRunner.java:421)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(
RemoteTestRunner.java:305)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(
RemoteTestRunner.java:186)
org.apache.cactus.client.ParsingException: Not a valid response
    at org.apache.cactus.client.WebTestResultParser.readRootElement(
LogAspect.aj(1k):140)
    at org.apache.cactus.client.WebTestResultParser.dispatch29_parse(
LogAspect.aj(1k):101)
    at org.apache.cactus.client.WebTestResultParser.around29_parse(
LogAspect.aj(1k):1236)
    at org.apache.cactus.client.WebTestResultParser.parse(LogAspect.aj
(1k):96)
    at org.apache.cactus.client.AbstractHttpClient.callGetResult(
LogAspect.aj(1k):230)
    at org.apache.cactus.client.AbstractHttpClient.dispatch2_doTest(
LogAspect.aj(1k):114)
    at org.apache.cactus.client.AbstractHttpClient.around2_doTest(
LogAspect.aj(1k):1236)
    at org.apache.cactus.client.AbstractHttpClient.doTest(LogAspect.aj
(1k):104)
    at org.apache.cactus.AbstractWebTestCase.runGenericTest(
AbstractWebTestCase.java:260)
    at org.apache.cactus.ServletTestCase.runTest(ServletTestCase.java:133)
    at org.apache.cactus.AbstractTestCase.runBare(AbstractTestCase.java:195)
    at junit.framework.TestResult$1.protect(TestResult.java:106)
    at junit.framework.TestResult.runProtected(TestResult.java:124)
    at junit.framework.TestResult.run(TestResult.java:109)
    at junit.framework.TestCase.run(TestCase.java:118)
    at junit.framework.TestSuite.runTest(TestSuite.java:208)
    at junit.framework.TestSuite.run(TestSuite.java:203)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(
RemoteTestRunner.java:421)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(
RemoteTestRunner.java:305)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(
RemoteTestRunner.java:186)

Any help would be appreciated