Cursor does not change to hand when rolling over a button

I have a number of PNGs set as buttons; 'hand cursor' is checked on under Properties > Actions (see screenshot) but when I preview the slide in my browser, the hand cursor doesn't appear. The buttons still work, but the user can't see that they're buttons. In addition, when I tried to set a rollover as an experiment, that doesn't seem to work either. Am I missing something? This is my first project using Captivate and so far I'm not impressed with the usability of it – it's almost like going to an MS Office program, it doesn't have the polish I associate with Adobe.