Wow Error in VoA - Ulduar and Utgarde Keep

Information on wow errors : northrend iron giant cannot load or something like that in ulduar and vault of archavon. and in UK the wow error is related about the wolves there. i try to relogg and same error and i need to character unstuck from the web. In ulduar when they killed the giant and I got a summon in XT i did the boss, but again in VoA had no chance and UK got kicked from the group for disconnecting as soon as I logged back on..
What should i do any suggestions? thanks in advance.

Again, if there's a iron giant like in Halls of Stone

error#134(0x85100086) Fatal Condition
"Failed to read file creature/northrendirongiant/northrendirongiant.m2.

Your client is corrupt, you have to download it again.