googleapp engine hello world 500 server error? - google-app-engine

Question

Trying out the hello world tutorial for googleapp engine. But get the 500 server error when I try to go on the deployed app.
http://chemstest.appspot.com/
The index works, but then the servlet gives me the error. Its written in java. I saw some things about case errors in web.xml but the app name and java class are all named in lowercase.
The servlet:
package com.chems.hellogoogleapp;
import java.io.IOException;
import javax.servlet.http.*;
#SuppressWarnings("serial")
public class hellogoogleappServlet extends HttpServlet {
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException {
resp.setContentType("text/plain");
resp.getWriter().println("Hello, James");
}
}
web.xml:
<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<servlet>
<servlet-name>hellogoogleapp</servlet-name>
<servlet-class>com.chems.hellogoogleapp.hellogoogleappServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>hellogoogleapp</servlet-name>
<url-pattern>/hellogoogleapp</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
appengine-xml:
<?xml version="1.0" encoding="utf-8"?>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application>chemstest</application>
<version>1</version>
<!--
By default, App Engine sends requests serially to a given web server.
To allow App Engine to send multiple requests in parallel specify:
<threadsafe>true</threadsafe>
-->
<!-- Configure java.util.logging -->
<system-properties>
<property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/>
</system-properties>
</appengine-web-app>
Hopefully an easy one to solve?