Wireless connection problems with D-Link DI634M

I have 1 desktop PC (wired) and 1 laptop (wireless) connected to
internet by way of DI634M router that I just purchased recently.
The connection on the desktop works fine but I have problems
connecting to internet with the laptop.

Once booted, wireless card connected to the router fine.
1) ipconfig shows the DNS suffix, IP, Subnet Mask, Gateway information
fine.
2) I can FTP to external sites fine.
3) I can logon to the router admin tool (192.168.0.1)

But, I can't connect to any websites.

It is as if the HTTP is turned off while other services are fine. The
only way to connect is to logon to router admin and reboot the router.
Once rebooted, the laptop will be able to connect to websites. The
process takes ~3 to 5 minutes each time when I need to connect to
internet on the laptop.

Is there a setting on admin that may cause this problem?


liu