If it is passing above test do as follows
In the console, click Clients.
Under View Clients, select the group in which you want the client to appear.
Right-click the group, and then click Export Communication Settings.
In the Export Communication Settings for group name dialog box, click Browse.
In the Select Export File dialog box, locate the folder to where you want to export the .xml file, and then click OK.
In the Export Communication Settings for group name dialog box, select one of the following options:
To apply the policies from the group from which the computer is a member, click Computer Mode.
To apply the policies from the group from which the user is a member, click User Mode.
Click Export.
If the file name already exists, click OK to overwrite it or Cancel to save the file with a new file name.
Rename this file to sylink.xml (You have to specially take care about extensions many will not take care the show/hide extension option in the folder option and as a result file name will be sylink.xml.xml :))
In th client PC
1. Click Start
2. Click Run
3. Type: smc -stop ( this will stop the Symantec Management Client service)
4. Navigate to: C:\Program Files\Symantec\Symantec Endpoint Protection on the SEP client
5. Replace the new Sylink.xml with the original one in the C:\Program Files\Symantec\Symantec Endpoint Protection folder.Also remove the old sylink file backups
6. Click Start
7. Click Run
8. Type: smc -start to start the service