Want to run one command after service group came online.

I have copied postonline script from /opt/VRTSvcs/bin/trigger/ directory and added the commands in the section (put your code). hatrigger is initaited by vcs but it is failed to execute the script.

hatrigger:Failed to execute /opt/VRTSvcs/bin/triggers/postonline w1es6008 mdmsg

Please guid me.