zimbra single node cluster error

[riju123]

Hi,
I have got following error in ZCS single node cluster setup-

" script:zimbra: start of /opt/zimbra-cluster/bin/zmcluctl failed (returned 127)".
After starting cman and rgmanager,when I checked 'clustat' it showed that cluster is stopped.I relocated cluster service on active node using clusvcdm command but still got the above error.

For your information I'm using ZCS NE 6.0.10 software and CentOS for cluster setup.Appreciate your help if you could help me to fix this.