The Symantec Management Software Agent is not ready

Hi,

All clients "Software Updates" tabs show: "The software update plug-in is not ready":

1.jpg

The "Default Software Update Plug-in Policy" is ENABLED.

One client log shows:

<event date='06/24/2014 13:16:53.2060000 +02:00' severity='2' hostName='XXX' source='Software Update Agent UI' module='PatchMgmtAgentsUI.dll' process='AeXAgentUIHost.exe' pid='4588' thread='4668' tickCount='22832453'>
  <![CDATA[Failed to get SoftwareUpdateAgent from Symantec Management Agent. Please check that the Software Update Agent policy is enabled]]>
</event>
<event date='06/24/2014 13:16:53.2530000 +02:00' severity='2' hostName='XXX' source='Agent' module='AeXNSAgent.exe' process='AeXNSAgent.exe' pid='1800' thread='5284' tickCount='22832500'>
  <![CDATA[Failed to create object 'Altiris.SoftwareUpdateAgent': The object is not registered or is not present in the policy (0x8000401B)]]>
</event>

What can the problem be?

Thank you so much.

Kind regards,