addMethod in jQuery Validate plugin with required = false

addMethod in jQuery Validate plugin with required = false

I have a simple script to test if field has alpha caracter

[code]
$.validator.addMethod("hasalpha", function (value) {
        return (/[a-z A-Z]/).test(value); // Has at least one letter
    }
);
[/code]

and it use this as a rules for my form

[code]
        name: {
            required: false,
            hasalpha: true,
            minlength: 5
        },

[/code]

The problem I have is that it always fire and error of not having at least 1 alphacaracter when the field is empty, even if required = false

Someone have a clue to solve my problem?

For reference I use this plugin: http://jqueryvalidation.org/