Altiris Agent redirect from one NS to Another

Hello

We using Altiris Client Management Suite 7.6 and we have two NS i.e Testing and Production.

From testing server we trying to redirect altiris agent and it got failed through command prompt as well as script on all the machine but from production to testing server redirection is succeeded with the same command. We using below command line to redirect altiris agent.

We tried to redirect through script as well as, we have directly run the below command on machine

C:\program files\altiris\altiris agent\aexagentutil.exe /server:NS Name with FQDN http://NS name:8016/altiris