Why wont my Wii connect to our new wireless router?

We had a different cable and internet provider that worked with our wii up until the end when I couldnt get it to go online for Black Ops, but Netflix worked. We then changed but we didnt have wireless so we went to Best Buy and got a Net Gear wireless router. We talked to a worker who said it was compatible with the Wii. We have had it set up on one computer just fine, one of our laptops needed the disk. The Wii wont connect though, no matter what we do. We tried putting the disk in but it didnt work. How do we fix it? any help is appreciated.