Unexpected Erro

Queria usar o E-gen, mas não estou conseguindo
eu configurei tudo oq precisa, coloqei os .jar nas pastas corretas
qnd vou abrir http://localhost:8080/egen, o tomcat da o seguinte erro:
24/11/2003 15&#58;57&#58;30 org.apache.catalina.authenticator.FormAuthenticator authenti
cate
WARNING&#58; Unexpected error forwarding to login page
javax.servlet.ServletException&#58; javax.servlet.jsp.tagext.TagAttributeInfo.&lt;init&gt;
&#40;Ljava/lang/String;ZLjava/lang/String;ZZ&#41;V
        at org.apache.jasper.servlet.JspServlet.service&#40;JspServlet.java&#58;256&#41;
        at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;853&#41;
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter&#40;Appl
icationFilterChain.java&#58;284&#41;
        at org.apache.catalina.core.ApplicationFilterChain.doFilter&#40;ApplicationF
ilterChain.java&#58;204&#41;
        at org.apache.catalina.core.ApplicationDispatcher.invoke&#40;ApplicationDisp
atcher.java&#58;742&#41;
        at org.apache.catalina.core.ApplicationDispatcher.processRequest&#40;Applica
tionDispatcher.java&#58;506&#41;
        at org.apache.catalina.core.ApplicationDispatcher.doForward&#40;ApplicationD
ispatcher.java&#58;443&#41;
        at org.apache.catalina.core.ApplicationDispatcher.forward&#40;ApplicationDis
patcher.java&#58;359&#41;
        at org.apache.catalina.authenticator.FormAuthenticator.authenticate&#40;Form
Authenticator.java&#58;246&#41;
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke&#40;Authentica
torBase.java&#58;546&#41;
        at org.apache.catalina.core.StandardValveContext.invokeNext&#40;StandardValv
eContext.java&#58;149&#41;
        at org.apache.catalina.core.StandardPipeline.invoke&#40;StandardPipeline.jav
a&#58;563&#41;
        at org.apache.catalina.core.StandardHostValve.invoke&#40;StandardHostValve.j
ava&#58;195&#41;
        at org.apache.catalina.core.StandardValveContext.invokeNext&#40;StandardValv
eContext.java&#58;151&#41;
        at org.apache.catalina.valves.ErrorReportValve.invoke&#40;ErrorReportValve.j
ava&#58;164&#41;
        at org.apache.catalina.core.StandardValveContext.invokeNext&#40;StandardValv
eContext.java&#58;149&#41;
        at org.apache.catalina.authenticator.SingleSignOn.invoke&#40;SingleSignOn.ja
va&#58;407&#41;
        at org.apache.catalina.core.StandardValveContext.invokeNext&#40;StandardValv
eContext.java&#58;149&#41;
        at org.apache.catalina.core.StandardPipeline.invoke&#40;StandardPipeline.jav
a&#58;563&#41;
        at org.apache.catalina.core.StandardEngineValve.invoke&#40;StandardEngineVal
ve.java&#58;156&#41;
        at org.apache.catalina.core.StandardValveContext.invokeNext&#40;StandardValv
eContext.java&#58;151&#41;
        at org.apache.catalina.core.StandardPipeline.invoke&#40;StandardPipeline.jav
a&#58;563&#41;
        at org.apache.catalina.core.ContainerBase.invoke&#40;ContainerBase.java&#58;972&#41;

        at org.apache.coyote.tomcat5.CoyoteAdapter.service&#40;CoyoteAdapter.java&#58;20
9&#41;
        at org.apache.coyote.http11.Http11Processor.process&#40;Http11Processor.java
&#58;670&#41;
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection&#40;Http11Protocol.java&#58;517&#41;
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt&#40;PoolTcpEndpoint.java
&#58;575&#41;
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run&#40;ThreadP
ool.java&#58;666&#41;
        at java.lang.Thread.run&#40;Thread.java&#58;536&#41;
Alguem sabe como arrumar isso?
naum sei se é erro na configuracao do tomcat, porque outras aplicações funciona corretmente
obrigadu
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