I think I found where the problem begin

If I only use this it´s OK an working fine
Code:
 on *:text:*:#:{
  if ($chan == #chan1) {
    if ($nick == billgates) {
      var %string = call
      if (%string isin $1-) { splay notice.wav }
    }



BUT! when i use the whole code it´s NOT working
Code:
on *:text:*:#:{
  if ($chan == #chan1) {
    if ($nick == billgates) {
      var %string = call
      if (%string isin $1-) { splay notice.wav }
    }
  }
  elseif ($chan == #chan2) {
    if ($nick == mom) { 
      var %string = hello
      if (%string isin $1-) { splay notice.wav }
    }
  }
}