Dlink-524 Intermittent Wireless

I've got a Dlink-524 router, connected to a Comcast modem. I somethimes
connect my Dell laptop wirelessly to the router, and sometimes I connect
it with an ethernet cable to a LAN port. I always have a desktop
connected to one of the router's LAN ports. Wireless and LAN connections
have been working fine for almost a year.

This relates to laptop.
In the last few weeks, I've been able to maintain the laptop's wireless
connection, and the wired connection, to the router, as shown by the
icons in the system tray, but when I try to get on the internet, my IE 6
browser opens, but I get nowhere. I first tried powercycling the modem,
the laptop and the router (in the proper order). This worked, but only
for a minute or so, as I'd loose my internet rather quickly, both over
the wired and the wireless connections, even though those connections
showed working in the system tray.

While all this is happening, the desktop's wired connection is fine, and
I can get on the internet.

I'm beginning to wonder if the router is crapping out, but I don't know
why I'd the desktop wired connection is fine and gets me on the internet,
and the laptop's wired and wireless connection show fine, but I can't get
on the internet.

Anyone know why I can't connect to the internet even though the system
tray icons show that I'm connected to either/both the wired and wireless
connection?

Thanks.
.

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