DEFY use wireless tether error message No Access Control!!

[tryagaaa]

My machine is motorola Defy
I can turn on the Wireless Tether to share network to my Nitendon 3DS
but I can't use Access control to define who is using my network
It give me a message that mention No Access Control caution
how to fix it??

 

[HalfAnAndroid]

Try this. Easily Tether Non-Rooted Android Phones With ClockworkMod Tether | VikiTech.com
It'll help, I think.

HalfAnAndroid