When i launch L2, i get this error of Gameguard:

fast translation:

Instruction from "0x10007e17" calls to memory under adress "0x77d3ed6e". Memory cannot be "written"

in fact, l2 launches and i can play... but hlapex/l2packethack doesnt detect l2 anymore after that error :/

I dont know what can cause it... any help?

try to delete game guard from your system folder, then run game, if you tried this, search in forums from gg alternative (something abaut emulation i dont remember)

Check this...  http://www.maxbastards.gr/forum/index.php?topic=2158.0

after deleting gg folder it simply redownloads it and error shows again.

when i try gg emulator, same error appears