Shoutbox

I love Messenger Plus so much I installed it on my work PC (we use Messenger to talk to our home workers) My boss however made us remove a lot of stuff with a recent clampdown and Msg Plus was told to go unfortunately. Although i've removed it I still have an advert which comes up as soon as I click on someones name in my contact list, regardless of wether I type anything to them or not. It says something along the lines of "I got my IM Names" etc etc   how do I remove this as i've been told to get rid and i've tried everything.

Thank you folks, hopefully you can help