Hi Shiva,
The issue comes when you see "Task Status" tab of a client with just installed Symantec Management Agent. This is because SM Agent of clinet takes some time to update this info with NS though the underline connection is established.
There are two ways to update it instantly -
1. Try "Check for tasks" option given on "Task Status" tab of Altiris Agent/Symantec Management Agent.
2. Restart Symantec Management Agent from services