Main quest stuck

1- Reporter: Qualan
2- What server: 9 - Light of Ra
3- Platform: Apple Macbook Pro
4- Operating system: Mac OS X 10.8.4
5- Description:
During The Culprit - kill all the fire elementals' the game locks up every time on the 3rd enemy encountered.
6- Summary:
I'm on "The Culprit - kill all the fire elementals." i go in, and immediately get a message about the map not loading. then i kill the 1st enemy, then encounter the 2nd enemy. the enemies move, but don't attack, and then after i've attacked 3 of the 5 the battle ends. i move on to the next enemy, and get 'unknown npc' after which the game is entirely frozen. i have to reload. happens every time. i've tried safari, firefox, and chrome and i've cleared all caches.