After chanage hostname,the listener startup field

Hi export

When I want to export system by export/import method,the log awake me

didn't find out the hostname erpdb,and I chanage the hostname use

command:hostname erpdb.After the chanage,I try to start oracle

lsnrctl,but lisener start field.

log:

TNSLSNR for IBM/AIX RISC System/6000: Version 10.2.0.2.0 - Production on 29-MAY-2010 03:03:18

Copyright (c) 1991, 2005, Oracle. All rights reserved.

System parameter file is /oracle/P00/102_64/network/admin/listener.ora

Log messages written to /oracle/P00/102_64/network/log/listener.log

Trace information written to /oracle/P00/102_64/network/trace/listener.trc

Trace level is currently 0

Started with pid=136010

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=P00.WORLD)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=P00)))

Error listening on: (ADDRESS=(COMMUNITY=SAP.WORLD)(PROTOCOL=TCP)(HOST=erpdb)(PORT=1527))

TNS-12545: Connect failed because target host or object does not exist

TNS-12560: TNS:protocol adapter error

TNS-00515: Connect failed because target host or object does not exist

No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=P00.WORLD)))

No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=P00)))