[drools-user] help to compile drools under eclipse

Hi,
I checked out all source codes from http://anonsvn.labs.jboss.com/labs/jbossrules/trunk.

Then I import compiler and core into Eclipse(JBossIDE for Eclipse 
2.0.0). But each time when compiling the projects, it tells "This project needs to migrate WTP metadata"?  The same problem is reported when compiling under Eclipse WTP-all-in-one.  (ant script works fine to generate jars)

Could you share how to compile sourcecode under Eclipse?

Thanks
Best Regards
wiley