Press the ESC key to quit the bootpicture. Then you can see what happened behind the picture and why the system did not boot completely.
It might happen that IPrefs crashes during the boot process (behind the bootpicture so this picture never disappears). In that case just reset your AmiKit by CTRL+LWin+RWin keys or press F12 and select RESET from the left-down area of the GUI.
IPrefs usually crashes on some hardware configurations, the reason is yet unknown. However, if you reset and try to boot again, the system should boot normally...
This hint is missing in German translation of AmiKit webpage. I apologize.
If it doesn't boot anyway, try to remove ShowAmiga96 from startup-sequence so the boot picture is not shown at all and you can see what's happening during the boot process...
If AmiKit refuses to start for whatever reason, try to use "AmiKit/S/Startup-Sequence.SAFEMODE" as a regular Startup-Sequence.