Laptop cannot connect when MAC filtering enabled

It almost sounds too silly to ask but someone has to... you did add the MAC address of your Atheros card, right?!

Yes, it shows up in my wireless listing of MAC addresses. In this case I disabled the MAC filtering and waited until it was discovered by the 2wire.
Sorry for not mentioning it.
Don

Did you use the correct syntax?

Some MAC filters will require colons (00:fc:64:ef:43:1b), others hyphens (00-fc-64-ef-43-1b), or nothing at all (00fc64ef431b).

And it's configured for Allow, correct?

This filter needs the colon between and gives you an example to follow, so I used the colons, and it did accept the address in the list. Then I selected the enable checkbox and hit the update button.
It works 2 ways, where you can just disable the MAC filtering and then after about a minute refresh the console, or enter it manually (I've done both) after which I updated the settings and then selected "enable filtering" without success.
Right now I'm looking at the wireless card settings to find something on MAC filtering because other laptops work.
Thanks

Well, after about a week of searching I got the answer. It seems that the 2wire modem (2101HG-B) has a bug, whereas it dosen't release the old MAC address unless the computer name is changed (If that makes sense).
Anyway, I found the answer on another site and when I changed the computer name and did a reinstall, as suggested, it worked.
So the problem is with the modem and I suspect this is true with all of these modems.
Here is the post I found:
Thanks to all and Eric and I hope this helps others!
Don
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Just an update, I did manage to solve this problem. Its a bug (I believe) in the 2Wire router. It kept pulling up the old mac address of the discarded wireless card, even when I entered the new mac address manually. Of course you can't tell this is happening because it replaces the mac address with the computer name. The only way around this problem was by giving the computer a different name, then, the router sees this a new machine and adds the proper mac address to its allow list. Wierd. – Eric Feb 9 at 3:53

Thanks for the update. I'm sure it will help someone in the future.

Yep - it just helped me.

I had the same problem with a wireless network card in a desktop. I switched cards and then found I could only connect if I disabled MAC filtering. I tried adding the MAc address manually but that still didn't work. Changed the (full) name on the PC and that fixed it. Now my network is much more secure again wih MAC filtering ON.

I think this is a common glitch with many wireless client devices.

So thanks guys.
Tony - Essex-UK