Problema con validacion en jquery

[seinkraft]

Estoy usando el plugin de http://docs.jquery.com/Plugins/Validation pero no puedo hacer que ande el equalTo.
Ingreso ambas passwords iguales sin embargo siempre me tira error diciendo que la password debe ser igual a la anterior.

Código javascript:

<script type="text/javascript">
 
$().ready(function() {
 
  $("#register").validate({
      rules: {
        user: {
          required: true,
          minlength: 3,
          maxlength: 25
        },
        pass: {
          required: true,
          minlength: 5,
          maxlength: 50
        },
        passconf: {
          required: true,
          minlength: 5,
          maxlength: 50,    
          equalTo: "#pass"
        },
        mail: {
          required: true,
          email: true
        },
      },
      messages: {
        user: {
          required: "Please enter a username.",
          minlength: "Your username must consist of at least 3 characters."
        },
        pass: {
          required: "Please provide a password.",
          minlength: "Your password must be at least 5 characters long."
        },
        passconf: {
            required: "Please provide a password.",
            minlength: "Your password must be at least 5 characters long",
            equalTo: "Please enter the same password as above."
        },
        mail: {
          required: "Please provide a email."
        }
      }
  });
});
 
</script>
 

Código html:

<form id="register">
<label>Username: </label>
<input type="text" name="user" value="<?php echo set_value('username'); ?>" size="25" class="input"/>
 
<label>Password: </label>
<input type="password" name="pass" value="<?php echo set_value('password'); ?>" size="25" class="input"/>
 
<label>Password Confirm: </label>
<input type="password" name="passconf" value="<?php echo set_value('passconf'); ?>" size="25" class="input"/>
 
<label>Email Address: </label>
<input type="text" name="mail" value="<?php echo set_value('mail'); ?>" size="25" class="input"/>
<input class="button" type="submit" />
</form>