Unable to initialize TldLocationsCache: null

I getting this error When I load JSP

org.apache.jasper.JasperException: Unable to initialize TldLocationsCache: null
org.apache.jasper.compiler.TldLocationsCache.init(TldLocationsCache.java:249)
org.apache.jasper.compiler.TldLocationsCache.getLocation(TldLocationsCache.java:220)
org.apache.jasper.JspCompilationContext.getTldLocation(JspCompilationContext.java:475)
org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:417)
org.apache.jasper.compiler.Parser.parseDirective(Parser.java:483)
org.apache.jasper.compiler.Parser.parseElements(Parser.java:1539)
org.apache.jasper.compiler.Parser.parse(Parser.java:126)
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:220)
org.apache.jasper.compiler.ParserController.parse(ParserController.java:101)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:495)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:476)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:464)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

******For JSTL******

1)jstl.jar and standard.jar exist in WEB-INF/lib

2)In web.xml I hava added:--

<taglib>
<taglib-uri>http://java.sun.com/jstl/core</taglib-uri>
<taglib-location>/WEB-INF/c.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>http://java.sun.com/jsp/jstl/fmt</taglib-uri>
<taglib-location>/WEB-INF/lib/standard.jar</taglib-location>
</taglib>

3)c.tld exist in the Directory WEB-INF

4)I have set class Path of jstl.jar and standard.jar(I do not know whether it is Required or Not, Please confrim)

My Jsp file:-
<%@page contentType="text/html; charset=ISO-8859-1" %>
<%@ taglib prefix="c" uri="WEB-INF/c.tld" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Test.jsp</title>
</head>
<body>
1+2+3=<c

ut value="${1+2+3}"/>
</body>
</html>

Regards
Khirod Patra

[ June 11, 2008: Message edited by: Khirod Patra ]
[ June 11, 2008: Message edited by: Khirod Patra ]