The problem is with plus reading the emoticons being used when you click on them using the WLM emoticon panel. For a work around have a look in the gradient thread as I posted a solution there. Please search before post (and when you have a problem with a script it is better to look there first and also put you problem in that thread too).
EDIT: if you want th link for my post, have a look at
markee's reply to [Release] Message Custmizer! Live (Gradient)