Adding External Jar files

Hello,

I have successfully created and deployed a portal application project (par file) that required adding as an external jar the file com.sap.portal.usermanagementapi.jar. Now I am re-doing the project as a development component in NWDI and I can add the external jar file fine and the source code shows no errors. However as soon as I build the DC I get a source error that says the import to com.sap.ip.portal.service.ume.IUserManagementEngine can not be resolved. If I go back to the java build path the usermanagementapi.jar is no longer there.

Do I have to handle the adding of external jar files in a different way for a DC as opposed to a par project?

Thanks,

Bert