Verify the log files, and use debug logging.
The HP custom actions in the deployment kit provide an option
for capturing the SMSTS.LOG file from WinPE and bringing it back to
the SCCM server. It also enables extended logging by the custom
action to assist with troubleshooting issues. Enabling the logging
("Logs / Return Files" tab in the action) assists in resolving
these issues. For more details, see the HP ProLiant Server OS
Deployment User Guide.