Suprgrl6969–are you sure you deleted MSN 6 fully ? Try going to Start>Settings>Control Panel>Add/Remove Programs and see if MSN Messenger 6 is listed there.
And I know MSN 6 is already out but it’s only a preview, so maybe msn has it set that you can only preview msn 6 for a certain amount of time before it starts freezing and stuff and you have to delete it and wait for the full version. Just a theory ?