JSP problem-- Serious

[anoop]

Dear all,   i am hving a serious prob using JSP's in Tomcat, even the example/sample JSP's fail to work..the tomcat window has this error stack trace..   Unhandled error! You might want to consider having an error page to report such errors more gracefully java.lang.NoClassDefFoundError: sun/tools/javac/Main         at org.apache.jasper.compiler.SunJavaCompiler.compile(SunJavaCompiler.ja va:128)         at org.apache.jasper.compiler.Compiler.compile(Compiler.java:238)         at org.apache.jasper.runtime.JspServlet.loadJSP(JspServlet.java:413)         at org.apache.jasper.runtime.JspServlet$JspServletWrapper.loadIfNecessar y(JspServlet.java:149)         at org.apache.jasper.runtime.JspServlet$JspServletWrapper.service(JspSer vlet.java:161)         at org.apache.jasper.runtime.JspServlet.serviceJspFile(JspServlet.java:2 61)         at org.apache.jasper.runtime.JspServlet.service(JspServlet.java:369)         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)         at org.apache.tomcat.core.ServletWrapper.handleRequest(ServletWrapper.ja va:503)         at org.apache.tomcat.core.ContextManager.service(ContextManager.java:559 )         at org.apache.tomcat.service.http.HttpConnectionHandler.processConnectio n(HttpConnectionHandler.java:160)         at org.apache.tomcat.service.TcpConnectionThread.run(SimpleTcpEndpoint.j ava:338)         at java.lang.Thread.run(Thread.java:484)   But i am not facing any problem in running servlets or serving HTML files..its only with the jsp's. Any help in this respect is very appreciated, thanks, Anoop Kumar