1. You can't use wildcards in comparisons like that, you're looking for the iswm operator, see /help iswm
2. You might also need a space between the if and the (.
3. In an on NICK event, you don't have a $chan because the nickchange is not channel-related, you are going to have to replace $chan by a specific channel or loop through $chan() or rather $comchan().
