Right boys & girls thinking caps on please!

I'm trying to setup a wireless lan connection for my laptop
and experienceing more than a little frustration!

I have a D-Link DWL520+ PCI card in the PC, and a DWL650+
PCMCIA in the laptop. My PC is also conncted to my ADSL Router
via a normal RJ45 10/100 Network connection. I'm running
Windows XP on main machine and Windows 2000 on Laptop,
latest drivers also downloaded & installed from D-Link site!

Using Windows XP I have "bridged" the wireless connection and
the normal ethernet connection on the main PC. The wireless link
is up at 22Mb/sec and the laptop has managed to send a DHCP
request to the ADSL router via the main PC and successfully got a
DHCP IP address & gateway. However I cannot get web pages,
network drives, or even ping the router from the laptop! Also I
cannot ping the laptop from the main PC or the command line on
the router. I'm tearing my hair out as the DHCP release / renew
requests work from the laptop, there's no authentication set at
the moment while I get it running. Has anybody any ideas?

Plasma