This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
If you open a command prompt at D:\TestProject\EventFile_Process and run "mvn install", does it work?
I have never used the maven plugin for ant, but from my reading the artifact:pom task populates the Ant build with the Maven properties. Thus it does not invoke the POM using Maven. To invoke the Maven build, you need to use the artifact:mvn task (http://maven.apache.org/ant-tasks/examples/mvn.html)