Mouse/Keyboard won't work during installation of Windows 7 during Bootcamp

Mouse/Keyboard won't work during installation of Windows 7 during Bootcamp. Could some one help me?

I tried to install windows 7 through the Bootcamp Assistent, finally it worked. And then my mac reboot to windows 7 screen, then i see the install home screen of windows 7. But i can’t do anything because my mouse and keyboard won’t worked.

Help?

Thanks