DR server maintenace

Dear All,

I am testing my DR server. i have resotred my full offline backup to Dr successfully. now i want to check it by making it onlne once. when i am starting the database, it is started. But when i am starting the lsnrctl, it is giving me error...

LSNRCTL for HPUX: Version 9.2.0.4.0 - Production on 09-JUN-2009 13:15:37

Copyright (c) 1991, 2002, Oracle Corporation.  All rights reserved.

Starting /oracle/PRD/920_64/bin/tnslsnr: please wait...

TNSLSNR for HPUX: Version 9.2.0.4.0 - Production
System parameter file is /oracle/PRD/920_64/network/admin/listener.ora
Log messages written to /oracle/PRD/920_64/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=PRD.WORLD)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=PRD)))
Error listening on: (ADDRESS=(COMMUNITY=SAP.WORLD)(PROTOCOL=TCP)(HOST=MSLDR)(POR
T=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
   HPUX Error: 13: Permission denied

Listener failed to start. See the error message(s) above...

plz suggest what i have to do. .

for your information, i have also change the ip of this server.

Ankit