[jQuery] Jquery plugin validation remote option

[viralme]

$(document).ready(function() {
    var valprod = $("#frmProduct").validate({
        onkeyup:false,
        rules: {
            txtProduct:{
                required: true,
                minlength: 4,
                productCheck: true
            }
        }
    });

    valprod.resetForm();
});

jQuery.validator.addMethod('productCheck', function(productname) {

    var postURL = "product/confirm_prod";

    $.ajax({
        cache:false,
        async:false,
        type: "POST",
        data: "txtProduct=" + productname,
        url: postURL,
        success: function(msg) {
            result = (msg=='TRUE') ? true : false;
        },
    });
    return result;
    }, 'Record Found'
);

my only issue is whenever 1st time it checks the record if found
record it display message Record Found but whenever i try to change my
textbox value it still gives me this message. it does not get reset if
record not found.