VBulletin help, chatbox error
 

I'm an admin on an VBulletin forums and our chatbox has recently went under an error. Whenever someone types in your chatbox, this pops up along with what they stated:

http://i50.tinypic.com/i3v5a1.png

If you may know what to do to resolve this problem, please respond as its becoming a extreme nuisance.