Unable to find AppWidgetset.gwt.xml

i 've just created a vaadin maven project using arquetype like in the tutorial.
I just modifed the build section of POM in order to use the wildfly server instead of the jetty.

<!-- WildFly plug-in to deploy the WAR -->

            <plugin>

                <groupId>org.wildfly.plugins</groupId>

                <artifactId>wildfly-maven-plugin</artifactId>

                <version>1.1.0.Alpha11</version>

            </plugin>

But when i try Maven/install i have the next error

[ERROR] Unable to find 'AppWidgetset.gwt.xml' on your classpath; could be a typo, or maybe you forgot to include a classpath entry for source?

What does it happen?
 

It's strange but now if i use Run configuration... with the goals

wildfly:deploy

it runs correctly