Need help getting started

[Brooks, Aiyana [CIB-IT]]

Hi,

I am new to Tapestry and am having some trouble getting the basic
(nothing dynamic) "Hello World" application to run. Whenever I run the
application I get the following error:

Unable to process client request: Failure enhancing class
org.apache.tapestry.html.BasePage: java.lang.StringBuffer: method
append(Ljava/lang/StringBuffer;)Ljava/lang/StringBuffer; not found

I am using WSAD 5.1 and I have the latest jdk and Tapestry versions
installed. Is there a configuration file that I might be missing? Can
anyone suggest how to fix this error? Below are the main files created
for this application.

Thanks and regards,

======
web.xml
======

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application
2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd";>
<web-app id="WebApp">
        <display-name>HelloWorld</display-name>
        <servlet>
                <servlet-name>HelloWorld</servlet-name>
                <display-name>ApplicationServlet</display-name>
        
<servlet-class>org.apache.tapestry.ApplicationServlet</servlet-class>
                <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
                <servlet-name>HelloWorld</servlet-name>
                <url-pattern>/app</url-pattern>
        </servlet-mapping>
</web-app>

=====
Home.page
=====

<?xml version="1.0"?>
<!DOCTYPE page-specification PUBLIC 
        "-//Apache Software Foundation//Tapestry Specification 4.0//EN"
        "http://jakarta.apache.org/tapestry/dtd/Tapestry_4_0.dtd"; >

        <page-specification>
        </page-specification>
        
=====
application.xml
=====

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE application PUBLIC "-//Sun Microsystems, Inc.//DTD J2EE
Application 1.3//EN" "http://java.sun.com/dtd/application_1_3.dtd";>
<application id="Application_ID" >
        <display-name>HelloWorldEAR</display-name>
        <module id="WebModule_1162501725198">
                <web>
                        <web-uri>HelloWorld.war</web-uri>
                        <context-root>HelloWorld</context-root>
                </web> 
        </module>
</application>
        <page-specification>
        </page-specification>

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