Settle workforce management Javascript Jasper exception errors from web.xml

I have a CentOS server running Tomcat 4.1/MySQL Server/Java JDK v1.5.0_11 all running correctly. #java -version runs correctly, the JAVA_HOME variable has been set in /etc/profile.d/java.sh. I loaded the /usr/local/tomcat/webapps directory with the settle webapp (http://sourceforge.net/projects/settle/) which unpacks from a .war file when viewed in a web browser. As soon as I browse to http://localhost:8080/settle/login.jsp it posts an HTTP 500 error with the following exceptions:

The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: /settleMain.jsp(0,0) This absolute uri (http://java.sun.com/jsp/jstl/core) cannot be resolved in either web.xml or the jar files deployed with this application
      at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:49)
      at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:383)
      at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:81)
      at org.apache.jasper.compiler.Parser.processIncludeDirective(Parser.java:265)
      at org.apache.jasper.compiler.Parser.parseIncludeDirective(Parser.java:298)
      at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:336)
      at org.apache.jasper.compiler.Parser.parseElements(Parser.java:749)
      at org.apache.jasper.compiler.Parser.parse(Parser.java:77)
      at org.apache.jasper.compiler.ParserController.parse(ParserController.java:159)
      at org.apache.jasper.compiler.ParserController.parse(ParserController.java:111)
      at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:185)
      at org.apache.jasper.compiler.Compiler.compile(Compiler.java:355)
      at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:427)
      at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:142)
      at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:240)
      at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:187)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:809)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:198)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:144)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:209)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:138)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2459)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:132)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:118)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:593)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:116)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:593)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:126)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:595)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:432)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:954)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:152)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
      at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
      at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
      at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
      at java.lang.Thread.run(Thread.java:595)

Apache Tomcat/4.1.34-LE-jdk14

I desperately need to get this solved for our workforce management division. I have exhausted every resource on the web I could find. We have a massive call center that is about to make way and I could really use some help. Thanks.