Each time I start Adium I receive an error message

Hi,
I’m using Adium on a Mac computer to keep in touch with my friends through MSN Messenger.
Adium was suggested to me by another person. My problem is that each time I start Adium I receive an error message.
I’ve only recently starting using Macs and this is my first error message on a Mac computer.
A screenshot of the error message that I am receiving is below.
How can I stop this error from occurring when using Adium?

Adium : Notice
