Jsp调试错误信息

org.apache.jasper.JasperException: Unable to compile class for JSP
An error occurred at line: 3 in the jsp file: /TestJsp/CounterBean.jsp
Generated servlet error:
    [javac] Compiling 1 source file
C:\Tomcat\work\Catalina\localhost\jsp-examples\org\apache\jsp\TestJsp\CounterBean_jsp.java:44: cannot resolve symbol
symbol  : class CounterBean 
location: class org.apache.jsp.TestJsp.CounterBean_jsp
      CounterBean counterBean = null;
      ^
An error occurred at line: 3 in the jsp file: /TestJsp/CounterBean.jsp
Generated servlet error:
C:\Tomcat\work\Catalina\localhost\jsp-examples\org\apache\jsp\TestJsp\CounterBean_jsp.java:46: cannot resolve symbol
symbol  : class CounterBean 
location: class org.apache.jsp.TestJsp.CounterBean_jsp
        counterBean = (CounterBean) _jspx_page_context.getAttribute("counterBean", PageContext.SESSION_SCOPE);
                      ^
An error occurred at line: 3 in the jsp file: /TestJsp/CounterBean.jspGenerated servlet error:
C:\Tomcat\work\Catalina\localhost\jsp-examples\org\apache\jsp\TestJsp\CounterBean_jsp.java:48: cannot resolve symbol
symbol  : class CounterBean 
location: class org.apache.jsp.TestJsp.CounterBean_jsp
          counterBean = new CounterBean();
                            ^
An error occurred at line: 10 in the jsp file: /TestJsp/CounterBean.jspGenerated servlet error:
C:\Tomcat\work\Catalina\localhost\jsp-examples\org\apache\jsp\TestJsp\CounterBean_jsp.java:57: cannot resolve symbol
symbol  : class CounterBean 
location: class org.apache.jsp.TestJsp.CounterBean_jsp
      out.write(org.apache.jasper.runtime.JspRuntimeLibrary.toString((((CounterBean)_jspx_page_context.findAttribute("counterBean")).getCount())));
                                                                        ^
4 errors
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:83)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:315)
org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:406)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:463)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:442)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:430)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:274)
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:810)<HTML> <!-- ********* CounterBean.jsp ********** -->
<BODY>
<jsp:useBean id="counterBean"
             scope="session"
             class="CounterBean"/>
<jsp:setProperty name="counterBean"
                 property="count"
                 value="10"/>
count:
<jsp:getProperty name="counterBean"
                 property="count"/><BR>
</BODY>
</HTML>//=================== CounterBean.java =================
import java.io.Serializable;
public class CounterBean implements java.io.Serializable
  {
  int count = 0;
  public CounterBean()  { }
  public int getCount() { count++; return count; }
  public void setCount(int c) { count=c; }
  }请各位高手帮我看看，我哪里错了？定当酬谢！！！