Weld does not find CDI Beans within AS7 modules

I've a my.jar which contains cdi beans and cdi producer methods and a META-INF/beans.xml file.
Putting this jar to WEB-INF/lib in my war, the web app can use the cdi producer methods of my.jar.
After moving my.jar from WEB-INF/lib to a AS7 module(and adding a dependency in the war's MANIFEST.MF) AS7 reports

org.jboss.weld.exceptions.DeploymentException: WELD-001408 Unsatisfied dependencies for type [BeanXY] with qualifiers [@Default] at injection point [[field] @Inject

It seams that weld does not (or cannot) scan my.jar which is inside AS7 module. (instantiating BeanXY directly ("new BeanXY()") works - so the module is loaded correctly)