Hey thanks for the reply.
What Country/State/Province do you live in? United Kingdon, England, London
Modem brand & model number: Openworld modem
Router brand & model number: BT HomeHub3
Network Connection Type: Wireless
If Wireless, what type of encryption are you using? WPA2-PSK
If Wireless, are you using a white or black external adapter, or an internal (Xbox 360S) adapter? Internal XB360 slim
Things you have tried: On the router, Port forwarded all the ports for xboox 360. Tried using a static IP address so ports are always forwarded for the correct IP. Back to Automatic at the moment. Restarting Moden and router. Upnp on, transmit at 40Hz wireless n, transit 802.11b,g,n. Test connection on dashboard numerous times. Can't think if there are other things I have tried.
Is UPnP Enabled? Yes
Is NAT Type Open? Yes Open
Any Error Codes you encounter: 8007274c, 73-8007274c
What type of internet do you have? Cable to cabinet, then copper to house
Who is your ISP(Internet Service Provider)? BT
After you run "Test Xbox LIVE connection" and click on "More info", what is the exact message shown on screen? I don't get an error message after testing connection, I get error messages after coming from a game to the dashboard.
Please don't discard the other info I gave in my first message as there might be clues to my problem there? I'm wondering if there is a hardware fault as the connection always shows 802.11g rather than 802.11n when my router is transmitting on b,g,n it should pick 'n', and my computer is using wireless and connecting flawlwssly with 802.11n.