SEP desktop clients not updating from SEPM server

For some reason, my SEP desktop clients in the desktop groups have stopped getting definitions from the SEP server. I noticed today that the conectivity icon is yellow and not green. The servers have gotten the latest update which right now is 2014-03-09 rev.024 but the desktops which are in their own client groups have 2014-02-06 rev.024

The clients are able to ping the management server. The clients in SEPM show connectivity with the SEP server. I am running SEP 11.0.5. Any help is appreciated.