[ossec-list] monitoring files and directories - using ossec 2.5.1

Hi all, I am new to ossec and I am having some issues with it. I updated the agent.conf file to monitor few windows and Linux directories. But, for some odd reason, sometime ossec does inform me that the files have changed (if there is any) and sometime it does not. Also, sometime I get the not

[ossec-list] monitoring files or directories - using ossec 2.5.1

/etc,/usr/bin,/usr/sbin /bin,/sbin