Rythm Music Band And Musician Joomla Template slider problem

Hi, I just installed the template and was trying to change the slider in home. The problem is that it doesn't accept the "Controllers Gap Fro Right" set by default (-180) and tells me it must be 0 or higher. Trying to set it to 0 or any other higher number, it continues not to save but this time without indicating any other problems. What can I do?