Agree box

I have in my forms made with JooDB Pro the following code:

<input id="acuerdo_id" class="required" title="Check the box if you agree" name="acuerdo" type="checkbox" value="YES" /> <label for="acuerdo">I accept the terms of use of this website</label>

But I can not get to appear at the top zone of warnings as required field, neither that the text of the attribute "title" is displayed when the cursor passes over the text.

Can you help me?

<label for="acuerdo" class="required" data-toggle="tooltip" title="Check the box if you agree"><input id="acuerdo" class="required" name="acuerdo" type="checkbox" value="YES"> I accept the terms of use of this website</label>

1 put the label outside your checkbox
2 rename acuerdo_id to acuerdo or for="acuerdo" to for="acuerdo_id"