X11 forwarding to windows

[lotust7]

Sorry I am new to linux and try to start x11 for windows

have putty running and xMing server running but cannot start xstart

sudo nano /etc/ssh/sshd_config says :X11Forwarding yes

startx or other answer command not found

But startx does not work or either other functions ype xlogo. You could also use xeyes, xclock


what do I have to do to forward or start X11 on xian?