Hi, thank you for your time

I set a message on MSN about 2 months ago, and I can't seem to make it go away! If I make a new one, it replaces the old one, but I can't erase the message entirely.

Just to clarify, I'm referring to the messages you can type, which show up in a speech bubble next to your picture. Not the status (Available/away/etc)

How do you erase them? D: