1. Open the service.properties and change the build number to the newest.
2. Go to Database and update the buildnumber in the table servicecomponent
3.Inside eclipse In the same directory as your service.properties file, create another service-ext.properties file and add a line “build.number=1″. This overrides whatever value is in service.properties, so you’re effectively disabling the build.number handling in service.properties.
4.Click on ant build service now. it will work.