On !*:Join:[color:red]#channel:{
msg $chan Welcome to $chan $+ , $nick
}
[/color]
Wont trigger when you join, 'Welcome to $chan $+ , $nick' will result in the line 'Welcome to #channel, nickname', change it as you will, the $+ links $chan and the , together so theres no space between them.
Hope this helps.
Eamonn.