http://ofbiz.116.s1.nabble.com/OFBIZ-installation-with-eclipse-XP-tp585845p622155.html
1) Open the "Externals tools configuration" created automatically by Eclipse while you ran "Run as==> 2Ant Build" option from
2) And look for the "run-install" target, it's the one you must run before being able to see the demo works