Just in case the question comes up, I'm posting this in security because there are some security settings in question regarding the problem. That said --

We just recently added a wireless AP to our LAN so that employees can bring in laptops and connect via wireless cards. So far, that's worked great. We're using a USRobotics 5450 AP.

Yesterday, however, an employee brought in his laptop (W2k) with a DLink G650 wireless card, and I can't get it to connect for the life of me. I contacted DLink support, and after two separate and very long troubleshooting sessions, they determined it was a router-side problem and sent me off to USRobotics. So, I go through two more very long troubleshooting sessions with USR, and they (knowing DLink sent me to them) determined it was a software problem and sent me back to DLink. Now DLink (knowing they've already sent me to USR who just sent me back to them) assures me it's a USR problem and to call another USR tech.

So, needless to say, I'm going nowhere really, really fast (and will have a new post for my "Tech Support Woes" thread!). Here's what I've tried:

USR advised me to remove ALL security (great advice!) and then surely it would connect. I did this long enough to see what would happen, and it indeed it didn't help matters.

I turned off encryption.

I modified features known to interefere with DLink cards:

Set preamble to long.
Enabled SSID broadcast.
Disabled turbo.
Disabled MAC filtering.
Disabled WEP.

So, now though my wireless network is wide open to attack, this dumb card still won't connect! It detects it, but tells me it's not broadcasting (even when I sit right beside the AP with a 100% signal detected). Today I put the card in another laptop -- same results. So, it looks like I'm out of options. Am I just screwed, or does anyone know any tricks? Have any of you run into this USR/DLink problem before?