Connecting pokemon black to WPA.?

So pokemon black us my 1st pokemon game on th DS and I heard it supports WPA keys. U have a DSi XL and u can connect it to wifi thru the WPA. When I try to access the WFC channel on black it says to check my settings. So is it possible to connect thru WPA? If bot I'll end up selling the game as not being able to trade or battle sucks.