I just bought 4 of stick.

now i'm running on cgminer. but I can't set freq.

cgminer -o stratum.antpool.com:3333 -u x -p x --compac-freq 200

I set like this. but it doesn't work. I add my cgminer screen shot.

Do I something wrong? why I can't set freq.
http://imgur.com/WfTnMvJ