Dear All There,
My Open Source zimbra is suddenly stop working, giving me this Errors. i did not change anything related to DNS or anything else in my network settings. All details of Zimbra is given below

zmcontrol -v
Release 7.1.1_GA_3196.RHEL5_20110527011124 CentOS5 FOSS edition.

1. cat /etc/redhat-release
CentOS release 5.5 (Final)

2. zmcontrol status
Unable to determine enabled services from ldap.
Enabled services read from cache. Service list may be inaccurate.
antispam Running
antivirus Running
ldap Running
logger Stopped
zmlogswatchctl is not running
mailbox Stopped
zmmailboxdctl is not running.
mta Running
snmp Running
spell Running
stats Running
zmconfigd Running

I am able to run Mailbox using zmmailboxdctl but it stopped after some time itself again and again.

3. zmlogswatchctl start
Starting logswatch...ERROR: service.FAILURE (system failure: unable to lookup server by name: message: [LDAP: error code 49 - Invalid Credentials]) (cause: javax.naming.AuthenticationException [LDAP: error code 49 - Invalid Credentials])
zimbra logger service is not enabled! failed.


; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>>
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52746
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

; IN A


;; Query time: 11 msec
;; WHEN: Sun Dec 16 17:30:03 2012
;; MSG SIZE rcvd: 66

Anyone can guide me what is wrong with Zimbra ???