Rogue "need more mana" problem in Karazhan

Hi, when I got to the chess part in Karazhan, I wanted to replenish my poisons on my daggers and it said "Need more mana" with my toon's voice and everything. Then I tried to take control of the warchief, but alas, the mana problem. I don't have mana, I'm a rogue! How can I fix this? Please help me!

Pic provided:
http://imgur.com/a/3WMlS

Update: not only in Karazhan, I TPed out to Summer's rest and wanted to go to Org through portal, and it again said "NEED MORE MANA" what the hell guys??
http://imgur.com/a/llWNU

Bump! Please help me, this is my main!

Same thing just happened to my rogue, it seems to be something to do with netherspite and standing in the beams. If you just die it goes back to normal.

Please post bugs on the bug-tracker, not here on the forum.