An easier way of your changing your IP is todo the following;
For Windows Users Only!
1. Connect directly to your cable modem,
DO NOT connect through a router, etc.
2. Load Command Prompt (Start, Run, Type 'cmd' and press Enter/OK). Black window appears.
3. Enter 'ipconfig /release'.
4. Disconnect the power supply from your cable modem, for 1 minute. (Whilst your cable modem is effectively powerless, enter 'ipconfig /renew' in the Command Prompt window, WAIT! DO NOT press Enter/OK)
5. Connect the power supply back into your cable modem, and then press Enter/OK on the above command (which was 'ipconfig /renew'), continuously repeat the same command using the UP button on your keypad (saves you manually typing it in).
6. It should hopefully provide you with a new IP. This has always worked for me.
The reason you enter 'ipconfig /renew' at step 4 is so that you don't waste time at step 5 -- If you waste time, there's every possibility that it won't work.
Hope that helps!
