Conquest of the Horde

So, when I try to trade with some one I get disconnected. Only when I hit the trade button, I can put items in the slots and what not. After that happens, if I don't restart wow, it tells me my login information isn't correct. If I restart I can log in but the trading issue still happens. Any suggestions?

Uh... Did you purge your cache?

Heh, only help I can come up with!

Purge Cache, delete Interface folder, addons could be acting up.