I can not start HTTP Server *ADMIN

[Tom Jia Jia]

I can not start Http Server *admin.

The message in job log is...

CPF9898 Escape 40 19/03/16 11:11:55.552230 QLWISVRA QSYS *STMT QLWIIHSMOD QHTTPSVR *STMT
From module . . . . . . . . : QLWIMSG
5761SS1 V6R1M0 080215 Job Log MLCNAS05 19/03/16 11:11:55 Page 2
Job name . . . . . . . . . . : ADMIN User . . . . . . : QTMHHTTP Number . . . . . . . . . . . : 022548
Job description . . . . . . : QZHBHTTP Library . . . . . : QHTTPSVR
MSGID TYPE SEV DATE TIME FROM PGM LIBRARY INST TO PGM LIBRARY INST
From procedure . . . . . . : sendStartStopMessage__10LwiMessageFPcsN31
Statement . . . . . . . . . : 55
To module . . . . . . . . . : MOD_IBMLWI
To procedure . . . . . . . : startLwiServer__FP10apr_pool_tP10lwi_conf_t
Statement . . . . . . . . . : 105
Message . . . . : INTEGRATED WEB APPLICATION SERVER Admin1 FAILED TO START.
SERVER Admin1 NOT FOUND IN REGISTRY.
Cause . . . . . : This message is used by application programs as a general
escape message.

Why the error out?
How can I find the Admin1 server?
Many thanks.