Pokemon fans/geniuses, HELP.

I have my DSi connected with the Internet but my Pokemon Platinum Will not connect at all. I know the procedure, but whenever I hit "Search for an Access Point" it just says: "The access point's security settings are not supported by the Nintendo DS. For help, visit sopport.nintendo.com." What the fuck is going on? ._.

And yes, I know there is a club for this, but no one answered. So, deal with it.