A lot of lag on battlegrounds

[rhyanda]

I run WoW on Ultra graphics with 60 fps, my ping is 40ms all the time but when I get to battleground and go in the melee it's just crashing. All are walking on one place and I can't get out from the lag until I hit Alt+F4, the lovely support just replys my tickes with no messages. Help please.

[ethernity7]

Addons.