Help.File insight not running in the background when system starts

Hi.I use Norton Internet Security 2012.I installed Norton Internet Security 2012 but its not running File insight in the background. When I install a program or download a program from the system or from the File insight internet does not work. It does not do any action at all. The program automatically runs without a norton scan. It does not warn me anything at all. My program runs but does not supervise. Thus very dangerous for my system. I had to reinstall Norton Internet Security 2012 and even his system but it's still not improved. File insight features still can not work. What do I do now. Help me.