Hi, I configured NSClient on Windows server, as menitoned in Nagios Documentation. Now, when i restarted the Nagios service on my Nagios Server, i gave me the following error, Stopping nagios: No lock file found in /usr/local/nagios/var/nagios.lock When i started the nagios service it gave, Starting nagios:CONFIG ERROR! Start aborted. Check your Nagios configuration. I tried to verify the nagios configuration it gave me the below error. Nagios 3.0.6 Copyright (c) 1999-2008 Ethan Galstad (<A target=\"_blank\" href="http://www.na gios.org">http://www.nagios.org</A>) Last Modified: 12-01-2008 License: GPL Reading configuration data... Error: Template 'windows-server' specified in host definition could not be not found (config file '/usr/local/nagios/etc/objects/windows.cfg', starting on line 25) ***> One or more problems was encountered while processing the config files...Check your configuration file(s) to ensure that they contain valid directives and data defintions. If you are upgrading from a previous version of Nagios, you should be aware that some variables/definitions may have been removed or modified in this version. Make sure to read the HTML documentation regarding the config files, as well as the 'Whats New' section to find out what has changed. Can anyone guide me whats going wrong in my configuration. I followed all the steps mentioned in NSCLient++ site. I want to montior my Windows Server (10.180.117.172) on my Nagios Server (10.180.117.171) having OS RHEL 4. Please help. <div style="border-top:1px dashed #ccc; border-bottom:1px dashed #ccc; padding:5px;"><a href="http://mail.in.com/mails/new_reg.php?utm_source=invite&utm_medium=outgoing" style="font:13px arial; color:#1E56A1; text-decoration:none;">Dear nagios-users! Get Yourself a cool, short @in.com Email ID now!</a></div>