Belkin Wireless Keyboard How Do I Make My Belkin Wireless Router Security Settings Compatible With My DS Lite?

How do I make my Belkin wireless router security settings compatible with my DS Lite? - belkin wireless keyboard

I have a Linksys wireless router. The model number is F5D7230-4. I do not know how to use the security settings for this and can not access my DS in conjunction with the current settings. Please help me!