zimbra stop and error when start again.

[azinux]

im using
Release 6.0.10_GA_2692.RHEL5_64_20101215170845 CentOS5_64 FOSS edition.
my os is centos running on ibm x3400
my zimbra is stop and when i started anymore, is say :

[zimbra@mail log]$ zmcontrol start
Host mail.xxx.co.id
Starting ldap...


Done.
Failed.
/opt/zimbra/bin/ldap: line 56: kill: (2736) - No such process
/opt/zimbra/bin/ldap: line 56: kill: (2736) - No such process
/opt/zimbra/bin/ldap: line 56: kill: (2736) - No such process
/opt/zimbra/bin/ldap: line 56: kill: (2736) - No such process
/opt/zimbra/bin/ldap: line 56: kill: (2736) - No such process
/opt/zimbra/bin/ldap: line 56: kill: (2736) - No such process
/opt/zimbra/bin/ldap: line 56: kill: (2736) - No such process
Failed to start slapd. Attempting debug start to determine error.
/opt/zimbra/bin/ldap: line 92: 2854 Broken pipe sudo /opt/zimbra/lib exec/zmslapd -l LOCAL0 -4 -u zimbra -h "${bind_url} ldapi:///" -F /opt/zimbra/dat a/ldap/config -d 1 2>&1
2855 Terminated | egrep "failed|error"



please advise me, thx

[azinux]

[root@maillog]#tail-fzimbra.log
May2706:21:24mailzimbramon[5253]:5253:info:zmmtaconfig:SkippinggetAllReverseProxyU RLsERROR:service.FAILURE(systemfailure:ZimbraLdapC ontext)(cause:javax.naming.CommunicationExceptionm ail.xxx.co.id:389)
May2706:22:46mailzimbramon[5253]:5253:info:zmmtaconfig:SkippingAllReverseProxyBack endsupdate.
May2706:22:46mailzimbramon[5253]:5253:info:zmmtaconfig:SkippinggetAllReverseProxyB ackendsERROR:service.FAILURE(systemfailure:ZimbraL dapContext)(cause:javax.naming.CommunicationExcept ionmail.xxx.co.id:389)
May2706:24:09mailzimbramon[5253]:5253:info:zmmtaconfig:SkippingAllMemcachedServers update.
May2706:24:09mailzimbramon[5253]:5253:info:zmmtaconfig:SkippinggetAllMemcachedServ ersERROR:service.FAILURE(systemfailure:ZimbraLdapC ontext)(cause:javax.naming.CommunicationExceptionm ail.xxx.co.id:389)
May2706:25:31mailzimbramon[5253]:5253:info:zmmtaconfig:SkippingAllMTAAuthenticatio nTargetURLsupdate.
May2706:25:31mailzimbramon[5253]:5253:info:zmmtaconfig:SkippinggetAllMtaAuthURLsER ROR:service.FAILURE(systemfailure:ZimbraLdapContex t)(cause:javax.naming.CommunicationExceptionmail.x xx.co.id:389)
May2706:26:53mailzimbramon[5253]:5253:info:zmmtaconfig:SkippingConfigurationforser vermail.xxx.co.idupdate.
May2706:26:53mailzimbramon[5253]:5253:info:zmmtaconfig:gs:mail.xxx.co.idERROR:serv ice.FAILURE(systemfailure:ZimbraLdapContext)(cause :javax.naming.CommunicationExceptionmail.xxx.co.id :389)
May2706:26:53mailzimbramon[5253]:5253:info:zmmtaconfig:Sleeping...Keylookupfailed.
May2706:28:20mailzimbramon[5253]:5253:info:zmmtaconfig:SkippingGlobalsystemconfigu rationupdate.
May2706:28:20mailzimbramon[5253]:5253:info:zmmtaconfig:gacfERROR:service.FAILURE(s ystemfailure:ZimbraLdapContext)(cause:javax.naming .CommunicationExceptionmail.xxx.co.id:389)