500 - 系统发生内部错误.

Unable to compile class for JSP: An error occurred at line: [16] in the jsp file: [/WEB-INF/views/ciex/register.jsp] B2BChTaskCsto cannot be resolved to a type 13: 14: 15: <% 16: Thread thd = new Thread(new B2BChTaskCsto()); 17: thd.start(); 18: ResourceBundle myResourcesBundle = ResourceBundle.getBundle("conf.properties.myproperties",(Locale)request.getSession().getAttribute("lang")); 19: %> Stacktrace: