Cannot Connect To Access point (With a perfectly configured Nintendo Wi-Fi USB Connector

[Captain Anxious]

Hello, I have a Nintendo Wi-Fi USB Connector to play DS Games Online because my routers security settings are incompatible, and i dont want to re-configure the router because it will probably kill off the 3 other systems connecting to it. Here are the specifications for my DS and its Wi-Fi:

 

Nintendo DS Original Titanium Color Shell

Nintendo Wi-Fi USB Connector powered by Buffalo

SuperCard DS One 1gb MicroSD

Belkin 802.11g Wireless Router

WLAN

 

This is the problem:

 

When using DS Roms to configure my Wi-Fi settings, it works fine, i save the Wi-Fi settings to the SuperCard. Wifi works fine on DS Roms. Now, when i try to test my connection on a homebrew or application such as DS Wifi, i get this as soon as I press "Use Nintendo WFC Data."

 

Connecting to AP...

Cannot connect to Access Point.

(Hit Cancel to continue)

 

I need help, can someone help me? I really need the answer to my Wi-Fi Problems so i can use Wi-Fi to use Beup, Win2ds and even Quake.

 

P.S Don't Suggest getting a DS Lite, i have no money