Monitor CentOS 5 installation

Having a great deal of trouble monitoring a CentOS 5 installation running Project-Open.

I’ve installed the plugins and NRPE. When I try to run a test command on the CentOS 5 box, I get a connection refused error. I find this odd because its a local command. Why would it refuse a command from itself?

P.S. I’ve added NRPE to the /etc/services file, and edited /etc/xinetd.d/nrpe to accept connections from 127.0.0.1