Did you go to the router page at
http://192.168.2.1 and setup the security as described a few pages back? If not do that first and let me know if anything needs further explanation or is plain wrong.
---------- Post added at 14:21 ---------- Previous post was at 14:08 ----------
My bad, the DS only supports WEP security so you should use that instead of WPA. Select 128-bit WEP check the box below that and then enter a pass phrase that will be used to generate a WEP key. Click apply.
---------- Post added at 14:30 ---------- Previous post was at 14:21 ----------
You'll need to write down the numbers+letters that appear in the empty boxes at the top as these need to be entered in the the DS later.
---------- Post added at 14:35 ---------- Previous post was at 14:30 ----------
Once that's done logout of the router and turn on the DS.
http://www.nintendo.com/consumer/wfc...ds/connect.jsp this might be easier to follow than me trying to take you through it, if you get stuck give a shout here and I'll try to help some more.