Wireless connection on my linksys software to Router WRT54g

The Linksys software in my Laptop is not connecting with my wireless router WRt54G and software gives the message of no internet connectivity. This happens when I re-installed the Vista home and tries to configure it but none of the router ports light up except some other lights. I checked the cables and unplugged it all and pressed reset button but it still router does not configure with my laptop.
Why my router is connecting with my Laptop? Is Vista not properly re-installed or are there any other configured settings in it?
