Altiris agents are not communicating with NS

Altiris agent communication problem. I have checked log files from client and shows like below.

<event date='Apr 14 11:28:25' severity='4' hostName='CR5_PC9' source='Client Task Agent' module='client task agent.dll' process='AeXNSAgent.exe' pid='2804' thread='1740' tickCount='1476515'>
  <![CDATA[CTAgent::GetAgentStatus() not ready.]]>
</event>
<event date='Apr 14 11:28:27' severity='4' hostName='CR5_PC9' source='Client Task Agent' module='client task agent.dll' process='AeXNSAgent.exe' pid='2804' thread='1740' tickCount='1478531'>
  <![CDATA[CTAgent::GetAgentStatus() not ready.]]>
</event>
<event date='Apr 14 11:28:29' severity='4' hostName='CR5_PC9' source='Client Task Agent' module='client task agent.dll' process='AeXNSAgent.exe' pid='2804' thread='1740' tickCount='1480515'>
  <![CDATA[CTAgent::GetAgentStatus() not ready.]]>
</event>
<event date='Apr 14 11:28:31' severity='4' hostName='CR5_PC9' source='Client Task Agent' module='client task agent.dll' process='AeXNSAgent.exe' pid='2804' thread='1740' tickCount='1482515'>
  <![CDATA[CTAgent::GetAgentStatus() not ready.]]>
</event>
<event date='Apr 14 11:28:33' severity='4' hostName='CR5_PC9' source='Client Task Agent' module='client task agent.dll' process='AeXNSAgent.exe' pid='2804' thread='1740' tickCount='1484515'>
  <![CDATA[CTAgent::GetAgentStatus() not ready.]]>
</event>
<event date='Apr 14 11:28:35' severity='4' hostName='CR5_PC9' source='Client Task Agent' module='client task agent.dll' process='AeXNSAgent.exe' pid='2804' thread='1740' tickCount='1486515'>
  <![CDATA[CTAgent::GetAgentStatus() not ready.]]>
</event>