msi afterburner fan control on gt70-dominator

hi

so i have an gt70dominator with the 870m graphics card, i downloaded msi afterburner to change the fan speeds but i couldnt because the slider is locked.

i have windows 8.1 64 bit and the latest nvdia drivers dont see whats wrong

[Imgur](http://i.imgur.com/gPipXpf.png?1)