UltraEdit, UltraCompare, UEStudio forums

I got UltraEdit-32 (version 10.2.3.0). Besides the normal exe their is a UltraCompare Lite exe (ucl.exe) (version 1.0.0.1). when I try to run ucl (>ucl.exe FILE1 FILE2 ) I get flash of the ucl screen, but that is all (next screen refresh the window is already gone). Any idea what i do wrong?