sound leakink problem from window .....need urjent advice!!!

salam , i just installed the windows between CR and Live room .......but if i play any drums little sound can be heard from the CR ......what can i do ?............... i have use 5+5=10mm laminated glass for live room and 6+6=12mm for CR ....it seems to me ...sound is traveling through glasses.....and every beat of snare is making is making vibration of plywood area under the glass of other room ..... what can i do?

@Stuart : is it because i have installed glass wool tightly with stick at the space (12"+)between the adjacent outer triple dry walls of both the rooms.......should thee be air gap between that?