[Q] Cant able to root my Iball-3G7271 (Kitkat4.4.2) topic

Hello friends, Im having my iball-3G7271 Tablet which is now upgrade from 4.2.1 to 4.4.2 im upgrade it from the service centre of iball but I cant able to root my iball-3G7271 Tablet (4.4.2). http://cdn4.xda-developers.com/images/icons/icon9.gifIm used many apps attached my tab to pc used .apk root app (for rooting my tab from app) but this also fails to root I used framaroot .apk (which works in 4.2.1), root genius windows .exe file use for root my tab, my tab automatically reboot & do nothing & even no su user install. So please help me to root my tab & big thank u for d help & ur help is appreciated.http://cdn4.xda-developers.com/images/icons/icon14.gif