I just knew you were going to say you had a d-link. :( I will leave aliali with this one so I can watch him pull out his hair. :D
The router is a D-Link DIR-625
Damn you Bowie, I am already loosing my hair I can't afford to pull out any.
Ye D-link (and Belkin) are not my favourite bits of hardware.
Was going to suggest firmware update for the D-Link but it does not exist on the AU/NZ site, appears to be a US model only.
Firmware 1.09 11/29/2006
Revision Info: ¤ Passes WiFi certification.
¤ Improved wireless data streams.
¤ Enhanced compatibility with Broadcom and Marvel clients.
Also note there is a different firmware for the DIR-624 Rev C version.
Firmware 3.08 3/04/2009
Revision Info: ¤ Fixed Ui error words: correct string word is "Can't choose WPA-Enterprise when WPS is enabled".
¤ Fixed the setting of "route rule can not be deleted emptily from the route list".
¤ Fixed when there are 8 over clients connect to Router,the records of wireless clients all. disappeared.
¤ Fixed ppp issue.
Still worth a try and if it bricks the D-Link no big loss IMO.
Given the age of both units I would personally retire them and get a new wireless N ADSL/Modem router all in one.
My favourite of the moment is the Billion 7800N because of gigabit LAN, wireless N (with good range and throughput) and solid connection on longer ADSL lines due to the Broadcom chipset it uses.
Your current ADSL attenuation (should be mentioned somewhere in the modems GUI) will determine what modems to look at. High speed low attenuation (under about 40dB) use anything except the Broadcom chipsets as they tend to give faster syncs. Anything over about 40dB use broadcom as you get a more stable connection (at a slight sync speed cost, but that's better than having the modem lose sync multiple times a day).
A good cheapy was the TP-Link TD-W8960N but I seem to remember the newer models no longer use the Broadcom chipset but now use Trendchip or something similar.
Why I suggest an all in one is it is one less device to power, easier setup, and not much more expensive than a pure router (if not cheaper even).