Server 2003 & Windows XP Resource monitors not collectin

I have the SNMP service configured on these systems with the public community set. Windows 2000 systems configured identically work. All of my XP and Server 2003 systems do not work.

I have rediscovered since configuring SNMP and I have my blue star.

I have no data for my default Mem/cpu/disk monitors, when I go into a trap config and click "Test Monitor" it shows "The Monitor did not respond to the test request"

If I manually add a different monitor like "% disk use" it shows me a list of disks on the server and the test works, shows graph.

I can also get the information through WMI.

I can manually configure WMI monitors for all my servers, that isn't a big deal. I would, however, like the default monitors to work on al of my workstations. I don't want to change hundreds.

Any pointers here? Am I missing a magic checkbox client-side? Did I not compile some nec. MIBs? Help Help.