do this:
download the NAGC trainer (you should see it here in GC hack bots cheat exploit thread)
now, run the NAGC trainer (if you're on windows 7, run as administrator)
then when the trainer pops the word "waiting for grandchase"
open your GC patcher then start your game
you will see now the trainer, then log in your GK.net account their
if your registered at game killer.net, you shouldn't have any problems with your log in in NAGC trainer
after that, delete your NAGC trainer, then download the GCPH trainer
and do the same procedure, but when the trainer start, you see that your account is still log in
this is the only solution i do for that problem, also try to follow this TUT for solving your problem:

hope i help ya!!