[jQuery] Radio button validation

[Oddish]

I've got a bunch of radio buttons, all with the name "type" and all
with different id's (type1, type2 etc.), and for some reason the
validate plugin doesn't protest when I don't select a radio button,
and I don't get any javascript errors either. Here's the code:

$("#addForm").validate({
        focusInvalid: false,
        event: "blur",
        rules: {
                type: { required:true }
        },
        messages: {
                type: "Please choose type"
        }
});

-------------------------------------

And here's the html

<label for="type1">
<input type="radio" name="type"  id="type1" value="1" />Type 1
</label>

<label for="type2">
<input type="radio" name="type"  id="type2" value="2" />Type 2
</label>

-------------------------------------

Anyone got a clue?

Thanks!