Story board no popups

[rodriguise]

I am trying to use this control and everything works fine accept the block setDidChangeValidState is never called and I don't get the snazzy popups on my textfields. Is there sometime additional I need to do?

_validator = [[US2Validator alloc] init];
[_validator addCondition: [US2ConditionPresent condition]];

_username.validator = _validator;
_username.delegate = self;
_username.validateOnFocusLossOnly = YES;

_password.secureTextEntry = YES;
_password.validator = _validator;
_password.delegate = self;
_password.validateOnFocusLossOnly = YES;

_form = [[US2ValidatorForm alloc] init];

[_form addValidatable: _username];
[_form addValidatable: _password];