Java EE (Java Enterprise Edition) General Discussion

I am getting the following error whenever I deploy or undeploy my jsp application using ant.

The error is :
Jun 30, 2007 1:18:50 PM org.apache.catalina.connector.CoyoteAdapter service
SEVERE: An exception or error occurred in the container during the request processing
java.lang.NoClassDefFoundError: org/apache/tomcat/util/buf/ByteChunk
at org.apache.catalina.util.Base64.decode(Base64.java:214)
at org.apache.catalina.authenticator.BasicAuthenticator.authenticate(BasicAuthenticator.java:165)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
at java.lang.Thread.run(Thread.java:595)


The ant call I used for accessing tomcat manager:

<target name="start">
<start
path="/${application.name}"
url="${manager.url}"
username="${manager.id}"
password="${manager.password}"
/>
</target>

Id and passwords seem to be correct, I get the error above, however my application is deployed and there is no problem other than the annoying exception

Thanks...