So I just purchased an Actiontec gt784wn wireless modem and now I can barely connect to Live. When I can connect to live it's very slow to do so and I'm not able to play any games online. Other times I just get the generic problem connecting, contact the support page error. I'm connecting wirelessly with WPA/WPA2 encryption, UPnP is turned on, my firewall is set to NAT only and I believe that's open (not really sure how to check). I'm using an original xBox with a white external adapter. Any help?