Problem with Airport Express & D-Link 615 Router

Hi there, this is my first post on the Community but as I am buying more Apple products I decided to sign up.
I have a D-Link 615 wireless router which would not broadcast far enough to the other side of my house (open plan) so I ran a cat 5 cable and connected up my Apple Express  to give wireless to this area. This has worked very well up until a few days ago when I upgraded the firmware to V.7.6.4 on the AE. Since then I have lost the wireless from the A.E. and despite resetting  and reconfiguring it I cannot seem to get it to work as it was.
The A.E. Utility is telling me that it cannot find the wireless network once it has updated, but doesn't seem to have a problem recognising the network name when I am initially configuring the unit. I have tried just about everything I can think of but to no avail, even plugging the A.E. into the router via another port and Ethernet cable but still with the same results. I thought that it (might) be a security issue so turned of the D-Link wireless security but still no result.
The strange thing is that it WILL 'create a new network' without any problem and broadcast at full strength!
Anyone have any ideas???
Many thanks

Hi Joe,
You got the short answer from
b Henry B,
which will save you lots of aggravation.
But if you're as curious, as I was, here's some more info I came across. I thought naively that a simple wireless 'repeater' would be straightforward and would work across different vendors of wireless basestations.
Maybe it would? But the Airport Express implements something called a
b Wireless Distribution System
b (WDS),
which sounds to me more complicated than just a simple wireless repeater. Maybe it has something to do with also honouring the encryption in the wireless signal to be repeated, err extended? Apparently WDS implementations are not standardized and currently
b rarely
work across different brands of wireless basestations.
Although apparently several folks have been successful extending the range of
b linksys
brand wireless basestations using an Airport Express,
b IF
they first update (swap out?) the linksys firmware with another (open source) version. Whew!
Anyhooow, for your situation, a brute-force option might be to replace the Ethernet cord between the Rogers cable modem and the D-LINK with a longer cable, so you can move the D-LINK closer to Living Room. (Or possibly get a longer CATV cable and move both the cable modem and D-LINK). You could even try increasing the range of the PowerBook with one of those Quickertek antennas.
But I expect it would be
b cheaper and easier,
if it came to that, to just replace the D-LINK with a 2nd Airport Express, which would then inter-work with the Airport Express in the Living room, using
b WDS.
best of luck,
...ben

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