[jQuery] Message didn't disappear in validation plugin

[jQuery] Message didn't disappear in validation plugin


I use jquery validation plugin 1.5.5, and got problem with error
message. They don't disappear when the form is valid or when i use
multiple rules, second rule message didn't show, the message is still
the first rule message.
Here's the code:
$(document).ready(function () {
    $('#user_form').validate({
        rules : {
            username : {
                required : true,
                min : 4,
                max : 32
            },
            password : {
                required : true,
                min : 6
            },
            password_again : {
                required : '#password:filled',
                min : 6,
                equalTo : '#password'
            },
            name : 'required',
            email : {
                required : true,
                validEmail : true
            }
        }
    });
});
when username is empty, required rule message appear properly, so when
username less than 4 char, but when i fill username with 4 or more
chars the min rule message still appear. email too, when it's blank,
required rule message appear, but when i put invalid email the message
still required rule message.
and here is my validEmail method:
$.validator.addMethod('validEmail', function (value, element) {
    var emailStr = value;
    var checkTLD=1;
    var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|
coop|info|pro|museum)$/;
    var emailPat=/^(.+)@(.+)$/;
    var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";
    var validChars="\[^\\s" + specialChars + "\]";
    var quotedUser="(\"[^\"]*\")";
    var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
    var atom=validChars + '+';
    var word="(" + atom + "|" + quotedUser + ")";
    var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
    var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
    var matchArray=emailStr.match(emailPat);
    if (matchArray==null) {
        //alert("Email address seems incorrect (check @ and .'s)");
        return false;
    }
    var user=matchArray[1];
    var domain=matchArray[2];
    for (i=0; i<user.length; i++) {
        if (user.charCodeAt(i)>127) {
            //alert("Ths username contains invalid characters.");
            return false;
        }
    }
    for (i=0; i<domain.length; i++) {
        if (domain.charCodeAt(i)>127) {
            //alert("Ths domain name contains invalid characters.");
            return false;
        }
    }
    if (user.match(userPat)==null) {
        //alert("The username doesn't seem to be valid.");
        return false;
    }
    var IPArray=domain.match(ipDomainPat);
    if (IPArray!=null) {
        for (var i=1;i<=4;i++) {
            if (IPArray[i]>255) {
                //alert("Destination IP address is invalid!");
                return false;
            }
        }
        return true;
    }
    var atomPat=new RegExp("^" + atom + "$");
    var domArr=domain.split(".");
    var len=domArr.length;
    for (i=0;i<len;i++) {
        if (domArr[i].search(atomPat)==-1) {
            //alert("The domain name does not seem to be valid.");
            return false;
        }
    }
    if (checkTLD && domArr[domArr.length-1].length!=2 && domArr
[domArr.length-1].search(knownDomsPat)==-1) {
        //alert("The address must end in a well-known domain or two letter "
+ "country.");
        return false;
    }
    if (len<2) {
        //alert("This address is missing a hostname!");
        return false;
    }
    return true;
}, 'Email is not valid');