DLink/Atheros Issue

I have a D-Link DI-614+ which I have used successfully for a while.
Used to connect to it all the time with my DL-650 from my ThinkPad,
and then tunnel into my office and check e-mail without any issues.
Now I have a new Toshiba Satellite laptop, and am having all kinds of
issues trying to connect. The two hot buttons are:

1. The Toshiba comes with an Atheros AR5001X+ chip for built-in
wireless access. This chip supposedly supports a, b, and g wireless. I
canNOT get this to connect to my 614+! I have tried reducing the
strength of the WEP encryption, turning off WEP encrytpion, enabling
broadcast of the SSID, specifying the MAC address of the Atheros,
turning off/on 4X support and NONE of these works. I can see and
connect to 3 other wireless routers in my neighborhood (which I
couldn't see with my DL-650!), so I know the Atheros works.

2. Since I could never get the Atheros to work, I installed my DL-650.
I can now connect to my router, get an IP, connect to other machines
on my network, connect to the Internet, etc. It's ALMOST all good. The
problem is, while using the wireless card, I canNOT tunnel into my
office and access Exchange or VSS servers. I can tunnel into the
office, and I can ping the servers by name, but I canNOT get a
connection via Outlook or VSS. Furthermore, I can connect the laptop
to the DI-614+ with an ENet cable and all that stuff works properly.
That would imply that there is a diff in config for the two
interfaces, right? Well, I walked down the complete config and canNOT
find anything different between them.

I installed the latest firmware for the 614 last night, and that had
no impact on my issue. OH - BTW, the laptop is running WinXP Pro, with
the latest & greatest SP,security patches, etc. I even tried enabling
and disabling the Wireless Zero Config service, and changing between
managing the wireless config via WinXP or via the manufacturer's
client, but it has made no difference in the results. I'm at my wit's
end!

TIAFAH! - Pat