Changing icons doesn't work

Attributes `state-on`, `state-off` and `rating-states` doesn't work for me.

When I try to change default icons (to not to be stars), e.g. by writing
``
or
``
this doesn't work. In first case, icons doesn't change, and in second case rating isn't displayed at all (even with default stars).

Apart from this, rating works just fine.