but I can rent them from my ipad. 2 questions: what could be wrong with my computer? I click on the rent tab and nothing happens. and if I do download to my ipad , can I synch it to the computer and get the movie on to it?
In System prefs>Personal>Security&Privacy>Firewall>Firewall Options - check to see that iTunes is set to 'allow incoming connections'. You might have to select the icon of the lock to gain access to the settings. You will use your computer admin password.