Hunter 4 speed fan switch
 

I have a Hunter fan with 4 speeds, which broke. Went to Home Depot for
a replacement and I think I bought the right replacement. The
controller contains 4 wires, black, green, brown, and grey. I can get
only 2 speeds and it won't shut off. Any suggestions on what I'm doing
wrong?

Thank you
V. Careatti
Annandale, VA