I am sorry for the inconvenience.
What do you mean by "nothing"? Black screen? Do the lights blink in down-right corner of the window?
Most likely it's because of wrong ROM.
The ROM is named 'Kickstart-A1200-40.68.rom'
located in AmigaOS 4.1 Final Edition:System/Emulation/AmigaROMs folder
Copy it to AmiKit according to the manual here: http://bit.ly/AmiKit-QuickGuide
and don't forget to rename it kick.rom
Also make sure you installed XQuartz,
Or check the installation video here: https://youtu.be/6X9zuBWpO9I