Cant redeem RP codes (client)

So, for my birthday, i got a few 10$ rp codes (my birthday was when reksai came out as well which was fun) but i didnt want to turn them in cuz at the time people were saying the rp purchases were bugged. Today i checked around and no one was complaining, so i tried to turn them in, cuz i want me some new snowdown skins (and maybe the reksai skin). Put in the codes and the first one worked. I put in the next and i get "Invalid HTTP response". getting the kat dancing animation for a bit, and my internet is fine (i am able to post on this site after all). What do i do?