Deploying application in domain failed; Error expanding archive

Hi iam getting the following error while deploying an application to sun application server:

Deploying application in domain failed; Error expanding archive /opt/SUNWappserver/domains/domain1/applications/j2ee-apps/dukesbank/dukesbank-appclient.jar; please see the server log file for more information

[314 byte] By [Nistelrooya] at [2007-11-27 6:47:47]