jsp exception -- help needed

[Krishna Srinivasan]

i am getting this exception -- what is the reason???
====================
org.apache.jasper.JasperException
at org.apache.jasper.runtime.JspRuntimeLibrary.internalIntrospecthelper(JspRuntimeLibrary.java:274)
at org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(JspRuntimeLibrary.java:220)
at org.apache.jsp.idbean$jsp._jspService(idbean$jsp.java:58)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:201)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473)
at

[Praful Thakare]

Krishna,
if u can paste entire exception it will be helpful