datanucleus maven plugin error?

[Gerard Ribas]

I'm a newbie of appengine, I'm trying to test basic jsp archetype but
doesn't work.

My error is in pom.xml, concrete this:

Plugin execution not covered by lifecycle configuration:
org.datanucleus:maven-datanucleus-plugin:1.1.4:enhance (execution:
default, phase: compile)

what it's the problem?

Thanks! ;)