I turned the WiFi off in my Actiontec long ago. I have major heat issues with them, so it eases the load by removing that source of heat. Instead I have a router configured as a Wireless Access Point inside my home. This not only removes any issue with the Actiontec (which I think is a miserable piece of equipment) and gives me not only faster WiFi (5 GHz 802.11AC) but a 4 port Gigabit switch as well.
One possible problem might be if you have special characters in your wireless password, such as * & # or others. Roku doesn't seem to like those very well.
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