Problem to print characters like "ç,º,á,ã" in the figure windows with xlabel, ylabel: FontSize don't work

Hello,

When I try to do (Using fprinf work):

fprintf('%c', 135);
>>ç

But When I try to put this in xlabel, ylabel or title it doesn't work:

xlabel('ç');
<<https://docs.google.com/file/d/0B13-qTmVDpAqT1NzcHB1eWlCMmc/edit?usp=sharing>>

When I try to put fontsize it don't work too:

title('title','FontSize',18) >>The string continues with the default size Somebody help me ?