Error while trying to use standard custom tag from Tomcat5.0

[Vishwajit Mankar]

Hello All,
I am getting following exception when I try to access my JSP. I have put jstl.jar in /WEB-INF/lib folder. But it doesn't contain talib.tld. Where will I get that and do I have to put in jstl.jar.

exception
org.apache.jasper.JasperException: Unable to read TLD "META-INF/taglib.tld" from JAR file "file:/C:/Tomcat5.0/webapps/exam/WEB-INF/lib/jstl.jar": java.lang.NullPointerException
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:50)
at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:411)
at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:183)
at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:181)
at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:418)
at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:483)
at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1539)
at org.apache.jasper.compiler.Parser.parse(Parser.java:126)
at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:220)
at org.apache.jasper.compiler.ParserController.parse(ParserController.java:101)
at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:490)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:471)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:459)
at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

Thanks,
Vishwajit