Question : SCCM not finding computers to push client to

Ok so I will admit that I am a complete novice with SCCM and this is probably an easy fix and a few things that I missed on my part because of my lack of knowledge.  I am trying to setup SCCM on the eval version to try and persuade my department to look into purchasing it.  I am having problems getting SCCM to find computers to install the client on.  My understanding is that I am supposed to be able to do a discovery of the subnet and the AD OU that I specified and it will find the computers available for the client push.  I'm not getting anything but the server itself.  Here is what I have.

SCCM installed on Server 2003 standard.  I have setup a boundary with an IP address range.  It is not protected.  I have also enabled the Client Push Installation and made it only available to workstations.  I changed the "Active Directory System Discovery" Discovery Method to enable and left "location" at Local Domain and left the Search option set to only recursive.  On clicking OK I selected the Active Directory OU that I want to use for installing the client because it is a test OU.  I have tried clicking "Run discovery as soon as possible" with no results.  

What I am trying to accomplish is have SCCM find the systems in a specific OU within active directory and make them available for the client install.  So far nothing is showing up in any of the collections.  I am apologize in advance for my ignorance as I know this should be standard stuff, but this is my first attempt at installing either SMS or SCCM.  I only played with SMS briefly at my last position and it was already installed.  Thanks for your help.  

-Kerb

Answer : SCCM not finding computers to push client to

Yes you are right, if you have not extended your schemas client will not be able to get information about management point. including server locator point in this case should help you along.