type Exception report

message

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

exception

org.apache.jasper.JasperException: /admin/creak.jsp(3,0) The value for the useBean class attribute beartool.MD5 is invalid.
    org.apache.(DefaultErrorHandler.java:39)
    org.apache.(ErrorDispatcher.java:409)
    org.apache.(ErrorDispatcher.java:150)
    org.apache.(Generator.java:1227)
    org.apache.(Node.java:1116)
    org.apache.(Node.java:2163)
    org.apache.(Node.java:2213)
    org.apache.(Node.java:2219)
    org.apache.(Node.java:456)
    org.apache.(Node.java:2163)
    org.apache.(Generator.java:3272)
    org.apache.(Compiler.java:244)
    org.apache.(Compiler.java:470)
    org.apache.(Compiler.java:451)
    org.apache.(Compiler.java:439)
    org.apache.jasper.(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)


note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

求救：这个问题怎么解决！