From level 15-60 i would tank for random dungeons. So I hit level 60 a few days ago and started doing quests in outland. At 61 i switched to doing Alterac Valley. At 64, however, i started doing random dungeons again. But i'm terrible at tanking now!

Here's my armory:

http://www.wowarmory.com/character-sheet.xml?r=Ravencrest&cn=Theappfan


Make sure to look at my talent build too, just in case.

So can anyone tell me why i all of a sudden suck at tanking?
Aggro- SOME times i will lose aggro to people that AoE before i even get to the mob. Then they say tank blows.

Healer- This is weird. In Hellfire Ramparts- the healers were fine, but in higher up ones- they sucked. Notice that i have basically ALL stamina gems.