Help. Wireless card fails intermittently. Read more...

Here's the scenario: I'll be surfing online and I'll type in a URL and it says the page cannot be found. I look down and my Windows wireless signal is full strength. So, I try to use the Windows "repair" function - and it tells me that the wireless card is not installed properly. I check out the card under Device Manager and it has failed to start. I then think this is weird - so I just restart the computer. Now it tells me that some new PCMCIA device with UNKNOWN MANUFACTURER has been installed, but that there are no drivers for it! Wait a minute! It was working fine a second ago. So, I remove the device and reinstall the drivers and get everything working just fine. Only, to get the "page cannot be found" error again and then my wireless card fails to respond.

So, then I just eject the card and reseat it - bam! The wireless signal is reestablished and I am surfing again - but not for long - it fails again. After reinstalling the drivers a million times, I figured out that I can just eject / reinsert and the card is recognized properly with the drivers.

Why is it doing this? I called D-Link (its a DWL-650_revP) and they went through everything. Finally suggested it might be a power management problem or some kind of hardware conflict.

Someone please help!! This is driving me nuts!

Here's what I have done:
Totally removed the card as hardware and reinstalled drivers and software.
Updated my Dell BIOS
Updated my Windows patches/updates
Not installed new programs recently
Not running any virus protection software

Help!