Hi i have a router d-link rangebooster G wbr-2310 wireless idont know how to unlock the router

You may need to reset the router (note that this will reset all settings).

To reset the router, locate the reset button (hole) on the rear panel of the unit. With the router powered on, use a paperclip to hold the button down for 10 seconds. Release the button and the router will go through its reboot process.
Wait about 30 seconds to access the router. The default IP address is 192.168.0.1. When logging in, the username is admin and leave the password box empty.

This is the webpage for the router on D-Link's site.
http://www.dlink.com/products/?pid=470

Navigate to http://192.168.0.1 in your web browser. For the username, enter "Admin". For the password, leave it blank.
Then follow the Setup Wizard to configure the router how you like.