D-Link Dir-615 Router cant get on interent

Hello,

Recently, I have bought D-Link Dir-615 and I have switch my OS to microsoft windows Vista.
After telling the computer to remeber the password and router, my computer is not able to connect to internet automatically after restarting. Therefore, I get into the wireless card properties, it seems like the wireless card has send the signal to the router; however the router does not respond back. It is working ok with my desktop; however, desktop is using wire connect to the router. Anyone has a clue what is going on?
thank for your time!