I have both Black and White. My Black game connects to the GTS fine, and my White game *used* to...but for the past couple of days, I can't connect with White. Sometimes it lets me search for a Pokemon or two before disconnecting me, but most of the time I never even make it to the "landing" screen. I have full bars of wi-fi connectivity, and my Black cartridge can connect just fine in this DS, so it's not the connection or the DS. The White one worked fine too until a couple of days ago. The only difference between the two cartridges is that I used PokeShift to bring over some of my Pokemon from SoulSilver to the White cartridge, and I haven't done that yet with the Black one. So far as I know, I don't have any "hacked" Pokemon either.
I'm really getting frustrated with this. It makes no sense. Is anyone else having this problem, and does anyone have any idea why it's happening?