If a problem occurs when you attempt to start the WebSphere Application Server - Express product, the first thing you should do is consult the installation documentation. See the installing WebSphere Application Server - Express for iSeries topic for more information.
These resources are available to help you determine what the startup problem might be:
Check the job log of the failing application server for errors. For information on viewing job logs, see Resources for monitoring the WebSphere Application Server - Express environment.
Check the application server log files for errors. For information on the application server log files and where they are located, see WebSphere Application Server - Express log files.
Read the release notes. See WebSphere Application Server - Express Release Notes for more information.