Wireless Adsl Modem Router What Can I Do About My Belkin ADSL Modem & Wireless G Router Which Won't Connect To The Internet?

What can I do about my Belkin ADSL Modem & Wireless G Router which won't connect to the internet? - wireless adsl modem router

I have a Belkin Wireless G ADSL Modem Router. I have had over 6 months and has worked almost error-free. I arrived this evening, the holiday and found it was disconnected from the network and changed again when they are not connected to the Internet. After checking the router not the phone was switched on. I have tried to separate and again with little success. Ideas? Who knows what could be the problem?