Application Development Software

while installing iPlanet Messaging Server 5.1 on sun SPARC solaris 2.8, i am getting the following errors. can any body help me out

Sun-Netscape Alliance
iPlanet Server Products Installation/Uninstallation
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Extracting Netscape core components...
Extracting Netscape Server Products Core Components...
Extracting Netscape Core Java classes...
Extracting Java Runtime Environment...
Extracting Netscape Directory Server...
Extracting Netscape Directory Server Console...
Extracting Netscape Administration Server...
Extracting Administration Server Console...
Extracting iPlanet Messaging Suite...
Extracting iPlanet Messaging Suite...
Extracting iPlanet Messaging Libraries...
Extracting iPlanet Messenger Express...
Extracting iPlanet Message Store and Message Access...
Extracting iPlanet Internet Message Transport Agent...
Extracting iPlanet Delegated Administrator Command Line Utilities...



[slapd-isosup]: starting up server ...
[slapd-isosup]: [18/Jul/2002:16:59:07 -0500] - Netscape-Directory/4.13 B01.023.0
116 starting up
[slapd-isosup]: [18/Jul/2002:16:59:07 -0500] - listening on all interfaces port
389 for LDAP requests
[slapd-isosup]: [18/Jul/2002:16:59:07 -0500] - slapd started.
Your new directory server has been started.
Created new Directory Server
Start Slapd Starting Slapd server configuration.
ERROR: Ldap authentication failed for url ldap://isosup.iplanet.com:389/o=Netsca
peRoot user id admin (151:Unknown error.)
Fatal Slapd Did not add Directory Server information to Configuration Server.
Warning Slapd Could not populate with ldif file Yes error code 151
ERROR. Failure installing Netscape Directory Server. Do you want to continue [n]
?
if any faced the same problem please let me know the solution to the problem
thanks and regards
Ananda Rao