PEX / MyBB  - Arraw error

Hi,

I need to synchronise my account of my PaperSpigot 1.7 and MyBB forum.
I try to configure the plugin, but I have an error : http://pastebin.com/Hav4BuAi
It would seem that this comes from an error in a table.

My config : http://pastebin.com/trfjk81n

I have another question on PEX. It's support the mysql database ? 

Best regards