Actually if you have a 'nickserv' identifier/alias then those won't work right as they are because mIRC won't pass "nickserv" onto the server as a command if it is a defined alias.
They should be changed...
Code:
alias ident .play -ap +ident nickserv nicklist.txt
alias -l +ident .msg nickserv identify $$2 password
and
Code:
alias ident .play -ap +ident nickserv nicklist.txt 2000
alias -l +ident {
  tnick $$2
  .msg nickserv identify password
  nick $mnick
}