I'm trying to get on Pokecheck to transfer Pokemon from 4th to 5th Gen. It was just working and I was able to get 4 of the 7 Pokemon transferred. It just randomly stopped working, and now I can't get on at all. To anything.

In response to your post in SQ/R: I'm sure you've already done it but double-check that you set the DNS settings back to normal after using IR-GTS, otherwise the only reason I can think of would be a problem with your router.