I just went through this ordeal with Roku. Their online support staff were very knowledgeable and courteous. What they instructed me to do was input DNS server values into the settings for my router. Now I know that sounds crazy and impossible if you are as technicapped as I am, but stay with me. What it means is putting some numbers in some boxes, on a web page. The webpage is actually the settings page for your wireless router, but that doesn't matter. I use a Linksys NetGear WRT54G v1 router - FYI.
Here it is, step by step. It is no more difficult than buying something online.
*You can repeat this process without actually being online, you just have to open your browser.
First: RELAX! BREATH DEEPLY.
Second: While keeping this window open for reference, open another browser tab or window.
Third: In the address box at the top of the new tab (not the search box,) type:
"http://192.168.1.1" (Without the quotes! They are there so you can copy the address.)
*This opens the settings for your wireless router.
You should see a request for a user name and a password.
For user name type "Admin" (No quotes.)
For password type "admin" (Again...)
This should open what looks like a web page, with a lot of places to put numbers. It probably says "Linksys," at the top.
If you can't log in, you may have set a password and user name yourself. If you can't remember it, push the tiny reset button on the back of your wireless router for 30 seconds. Let it reboot and try all this again. *If you have to do that you might print this for reference, because you might not be able to get back on line right away. Relax/Breath. We can do this.
You will see tabs at the top of the page. We are looking for the "basic setup" tab. On my router the appropriate tab comes up by default. Scroll down the middle of the page until you find boxes that are labeled "Static DNS 1," and "static DNS 2." Following each will be four boxes for inputting numbers. They will probably have zeros in them.
In the boxes for "Static DNS 1" input these numbers: 208. 67. 220. 220 (one set in each box - no dots.)
In the boxes for "Static DNS 2" input these numbers: 208. 67. 222. 222 (one set in each box - no dots.)
Lastly: Click on "Save settings," at the bottom of the page-BUT WAIT! *When you click this button it may shut down your internet. Relax. Take a deep breath. Get a drink of water. It's going to work.
First of all, my changes did not save the first two times I did this and of course, it didn't work. When the changes were saved, I actually got a message saying that my changes were saved successfully. After this I rebooted everything and now it all works beautifully. *You can repeat this process without actually being online, you just have to open your browser.
Also, your junk may stop logging onto the internet momentarily. This is okay, just reboot everything, and wait. Most modern equipment will find the new network. It will work unless you have another problem. Firewall? WEP security code? Mwahahahah!
You may need to reset your Wii/Roku/Wireless device to the new network through their respective settings interfaces. I won't go into that because if you have gotten this far, you know all about it. What you will have is a new generic network, with settings for specific Global DNS values, but who cares! If you need to secure your wireless connection you may need further study on WEP, lol.