This isn't working.. I have no idea what I am doing, please help

Code:
On *:text:!viewers:#:{
  %exNicks $wizebot $zacbot661 $chan $nightbot
  $istok(%exnicks,$nick(#,%x),32)
  msg # There are $nick(#,0) viewers in the chat. Take note, this does not exclude bots. 

}