Norton Anti-Virus on windows server 2003

Hello,

 

I have a twofold question.

1. Why would I be able to install Norton 360 v4 on one server running windows server 2003 and not another identical setup. I says I must update to service pack 2 which is installed.

 

2. I have an unused Norton AntiVirus CD from 2011 and when I tried to install it it said it didn't support windows server 2003. What can be installed? Norton 360 v4 or v5 would be my first choice.

 

Thank you