First of all post it in the HELP FORUM which is not in the DiabloII section, read the sticky thread to read more about joining the full Zelaron network instead of just the DiabloII section of it.

Secondly go in Start>Settings>Control Panel>Administrative Tools and go to Services.. in there disable MESSENGER (it should be displayed in Alphabetical order so you won't have to search for it) when you do you shouldn't recieve anymore messenger popups.

My sig won't show =/