Deploying application in domain failed

Hi, I'm trying to deploy my first JSP Web Component using the Deployment Tool. It creates the WAR file but I get the message Unknown deployable object type specified, the file origin to deploy does not exist. In the first page of the wizard I select a location for the WAR file and a name for it. I added all the files underneath the WEB-INF directory and don't know what's missing.

[392 byte] By [drholiday] at [2007-11-26 6:44:44]