I am just using GWT 3.0 methods and getting the following error

[TRACE] [helloworldgwt] - Loading inherited module 'com.sencha.gxt.ui.GXT'
[ERROR] [helloworldgwt] - Unable to find 'com/sencha/gxt/ui/GXT.gwt.xml' on your classpath; could be a typo, or maybe you forgot to include a classpath entry for source?
[ERROR] [helloworldgwt] - Line 7: Unexpected exception while processing element 'inherits'
[ERROR] [helloworldgwt] - Failure while parsing XML
[ERROR] [helloworldgwt] - Unexpected error while processing XML
[ERROR] [helloworldgwt] - Failed to load module 'helloworldgwt' from user agent 'Mozilla/5.0 (Windows NT 6.1; rv:8.0.1) Gecko/20100101 Firefox/8.0.1' at zzzz.com:60261

HelloWorldGWT.gwt.xml is as follows

<?xml version="1.0" encoding="UTF-8"?>
<module rename-to='helloworldgwt'>
<!-- Inherit the core Web Toolkit stuff. -->
<inherits name='com.google.gwt.user.User' />
<inherits name='com.google.gwt.user.theme.clean.Clean' />
<!-- Other module inherits -->
<inherits name='com.sencha.gxt.ui.GXT' />
<inherits name="com.sencha.gxt.chart.Chart" />
<!-- Specify the app entry point class. -->
<entry-point class='com.example.gwt.client.HelloWorldGWT' />
<!-- Specify the paths for translatable code -->
<source path='client' />
<source path='shared' />

gxt-3.0.0-beta1,jar and other related jars (chart, legacy & uibinder bridge) are in the build path.

The program executes when using standard Google GWT classes.

Any suggestions. I am sure this might be something simple I am missing

Thanks in advance.