Running Vaadin on JDeveloper Studio Edition Version

Hi !. My name is Agustin… I have the followinf problem… I have installed Vaadin plug-in in NetBeans and I run the example and it worked. But when I copy the structure to the JDeveloper IDE, I couldn’t manage to run it as it was asking me to choose a default run target… How can I solve this ?. Does anyone have any ideas ?.. Thankx