Black and White recent happenings thread!

I finished the game and I'm trying to trade with my friend who has Pearl but I can't enter her FC, it says that my friends FC is invalid. She gets the same message when she tries. I haven't played since Red and Blue so all this stuff is new to me. I went serching sites that might help but nothing so far, any suggestions?

You can't trade >: you can pokétransfer only, and that's a one-way thing.

Edit: Ninjas.