NIS 2009 blocking internet

I have three licensed version of NIS2009. I installed one on my daughter's computer and now it blocks internet completely. I can't log on internet at all. Her system is running on windows XP professional. This computer is located in her store and has security camera hooked up. Since it looses internet connection, we are unable to monitor the store from remote site. I need help urgently.

 

Thanks

Noor Motani