When I reach to windows 7 installing window I cant use any thing connectted to USB ports or even my key board and mouse pad. Could you help in that?

Hi All,

I am finding an issue with useing Boot Camp utility I prepared the thumb drive as the steps has been explained. However, When I reach to installing the windows page I couldn't do any thing because my keyboard and mouse pad is disabled. I tried even connecting a mouse with USB connecting it never worked.

Is there any solution published? if so please refer.