Matrix Cellular — Licence key is not valid

Hi.

I have purchased 4 user escan internet security on 14/01/2013 from your dealer in Bangalore, Two week after, i was send to home town in Delhi.My brother tried to installed home pc but every time,it is showing that license key is not vailed. Whenever I want to register the process and put the License key it shows that your License key has valid. Also inside box mentioned key valid in Karnataka only but last year i purchased in Bangalore and installed in Home town in Delhi and license key activated. But now i got error massage so pls tell me next, what do u do and short out the matter asap..

Regards
Praveen Kumar
mob:[protected]